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Öğe The 2 stage liver transplant 3 clinical scenarios(Experimental and Clinical Transplantation, 2015) Gedik, Ender; Bıçakçıoğlu, Murat; Otan, Emrah; Toprak, Hüseyin İlksen; Işık, Burak; Aydın, Cemalettin; Kayaalp, Cüneyt; Yılmaz, SezaiThe main goal of 2-stage liver transplant is to provide time to obtain a new liver source. We describe our experience of 3 patients with 3 different clinical conditions. A 57-year-old man was retransplanted successfully with this technique due to hepatic artery thrombosis. However, a 38-yearold woman with fulminant toxic hepatitis and a 5-year-old-boy with abdominal trauma had poor outcome. This technique could serve as a rescue therapy for liver transplant patients who have toxic liver syndrome or abdominal trauma. These patients required intensive support during long anhepatic states. The transplant team should decide early whether to use this technique before irreversible conditions develop.Öğe The 2-Stage Liver Transplant: 3 Clinical Scenarios(Baskent Univ, 2015) Gedik, Ender; Bicakcioglu, Murat; Otan, Emrah; Toprak, Huseyin Ilksen; Isik, Burak; Aydin, Cemalettin; Kayaalp, CuneytThe main goal of 2-stage liver transplant is to provide time to obtain a new liver source. We describe our experience of 3 patients with 3 different clinical conditions. A 57-year-old man was retransplanted successfully with this technique due to hepatic artery thrombosis. However, a 38-year-old woman with fulminant toxic hepatitis and a 5-year-old-boy with abdominal trauma had poor outcome. This technique could serve as a rescue therapy for liver transplant patients who have toxic liver syndrome or abdominal trauma. These patients required intensive support during long anhepatic states. The transplant team should decide early whether to use this technique before irreversible conditions develop.Öğe Abdominal Closure with Bogota Bag after Pediatric Liver Transplantation.(Wiley-Blackwell, 2014) Kutluturk, Koray; Otan, Emrah; Karabulut, Ertugrul; Aydin, Cemalettin; Kayaalp, Cuneyt; Yilmaz, Sezai[Abstract Not Available]Öğe Aborted Donor Hepatectomies for Living Donor Liver Transplantation: A Single Center Experience(Lippincott Williams & Wilkins, 2016) Kutluturk, Koray; Otan, Emrah; Dirican, Abuzer; Yilmaz, Mehmet; Isik, Burak; Ozdemir, Fatih; Ince, Volkan[Abstract Not Available]Öğe Amebic Acute Appendicitis: Systematic Review of 174 Cases(Springer, 2013) Otan, Emrah; Akbulut, Sami; Kayaalp, CuneytThis study aimed to determine the clinical and demographic features of acute amebic appendicitis by reviewing the reported cases. The PubMed and MEDLINE databases were searched to identify articles related to amebic appendicitis using key words. The search included all articles published between 1935 and 2012 without restricting language, journal, or country. A total of 174 cases of amebic appendicitis reported in 42 articles were analyzed. The mean age of the patients was 23.5 years (range 2 months-83 years). The majority of patients were male (74.0 %), and the majority of cases were reported from countries with high/moderate risk for amebiasis (76.5 %). A history of traveling to a high/moderate-risk country was cited in 64.0 % of the overall cases. The interval between travel and onset of clinical symptoms ranged from months to years. History of or coexisting dysenteric diarrhea was present in only 7.0 and 14.0 % of overall cases, respectively. A preoperative diagnosis of amebiasis was cited for only five cases (3.0 %). Complicated appendicitis was present in 30.7 % of cases, some of which required colon resection. Severe postoperative intraabdominal complications (e.g., liver abscess, abdominal sepsis, gastrointestinal fistula, hemorrhage) occurred in 19.4 % of surgery-treated patients. The overall mortality rate was 3.2 %. Appendectomy specimens should be routinely sent for histopathologic examination. In the case of suspected amebic acute appendicitis, extra precautions-early appendectomy, metronidazole for antibiotic prophylaxis, wet-preparation examination, obtaining a timely pathology result, increasing the awareness of uncommon complications of appendectomy-can hasten appropriate therapeutic intervention and improve outcome.Öğe Artificial vascular graft migration into hollow viscus organs in patients who underwent right lobe living donor liver transplantation(Taylor & Francis Ltd, 2020) Koc, Cemalettin; Akbulut, Sami; Bilgic, Yilmaz; Otan, Emrah; Sarici, Baris; Isik, Burak; Bayindir, YasarBackground:To share our experience with hollow viscus migration of artificial vascular grafts (AVG) used for venous reconstruction of the right anterior sector in living donor liver transplantations (LDLT). Methods:Clinical, radiological, and endoscopic data of 13 right lobe LDLT patients (range: 26-67 years) with a diagnosis of postoperative AVG migration into adjacent hollow viscus were analyzed. Results:Biliary complications were detected in 12 patients. A median of four times endoscopic retrograde cholangiopancreatography (ERCP) procedures were performed in 11 patients prior to AVG migration diagnosis. A median of 2.5 times various percutaneous radiological interventional procedures were performed in eight patients prior to AVG migration diagnosis. The site of migration was the duodenum in eight patients, gastric antrum in four, and Roux limb in the remaining one patient. The migrated AVS were made of polytetrafluoroethylene (PTFE) in 10 patients and polyethylene terephthalate (Dacron) in three. The migrated AVGs were endoscopically removed in seven patients and surgically removed in six. Only one patient died due to sepsis unrelated to AVG migration. Conclusion:AVG migration into the adjacent hollow viscus following right lobe LDLT is a rare and serious complication. Repetitive ERCP, interventional radiological procedures, infection related to biliary leakage, and thrombosis of AVGs are among the possible risk factors.Öğe Clinical Characteristics and Outcomes of Liver Transplantation Recipients With COVID-19 Pneumonia(Elsevier Science Inc, 2021) Kose, Adem; Toplu, Sibel Altunisik; Yalcinsoy, Murat; Yakupogullari, Yusuf; Otlu, Baris; Otan, Emrah; Aydin, CemalettinBackground. We aimed to evaluate the clinical characteristics and outcomes of mild-severe COVID-19 pneumonia cases in liver transplant (LT) recipients. Methods. Ten LT recipients diagnosed as having COVID-19 pneumonia in a 6-month period in our transplantation center were included. Demographic and medical data of the recipients were retrospectively collected; clinical courses, treatment responses, and outcomes were evaluated. Results. Ten LT recipients were male, had a median age of 57 years (min-max, 36-69 years; interquartile range [IQR], 13 years), and had right lobe from living donor LT performed in a median of 11 months (min-max, 1-72 months; IQR, 12 months). Five patients had severe pneumonia, and the remaining patients had mild/moderate pneumonia. The most frequent symptoms were fever (90%) and cough (70%). Favipiravir, enoxaparin sodium, and corticosteroid were initiated at the time of the diagnosis; immunosuppressive drug doses were reduced or discontinued in 3 cases. Lymphopenia median: 510/mL (min-max, 90-1400 mL; IQR, 610 mL), increased levels of C-reactive protein median: 4.72 (min-max, 0.31-23.4; IQR, 8.5), and ferritin median: 641 (min-max, 40 to >= 1650; IQR, 1108) were frequent. Four patients required antibacterial treatments because of emerging bacterial pneumonia and/or sepsis. All patients were hospitalized for a median of 10 days. One patient with sepsis died on the 26th day after intensive care unit admission, and the remaining 9 survived. No further complication was recorded for 1-month follow-up. Conclusions. Commencing favipiravir, enoxaparin sodium, and corticosteroid treatments; close follow-up of the developing complications; the temporary reduction or cessation of immunosuppression; a multidisciplinary approach; early awareness of the bacterial infections; and the initiation appropriate antibiotic treatments can contribute to success.Öğe Comparison of Plasmapheresis and Molecular Adsorbant Recirculation System Treatment Results for Posttransplant Liver Graft Dysfunction(Lippincott Williams & Wilkins, 2015) Otan, Emrah; Akbulut, Sami; Karagul, Servet; Aydin, Cemalettin; Kirmizi, Serdar; Colak, Cemil; Yilmaz, Sezai[Abstract Not Available]Öğe Current approaches to esophageal variceal bleeding(J Turgut Ozal Med Cent, 2015) Ünal, Bülent; Kutlutürk, Koray; Pişkin, Turgut; Otan, Emrah; Aydın, Cemalettin; Yılmaz, SezaiEsophageal varices are collateral veins at the distal esophagus between gastric and azygos veins arising following increased portal pressure. Vein pressure above 10 mmHg is regarded as portal hypertension, in which portal vein-hepatic vein pressure gradient is increased. This status is seen as "clinically important portal hypertension" and it is most common in liver cirrhosis. Acid and esophageal variceal bleeding is the result of portal hypertension, which are the signs of advanced disease with poorer survival rates. Esophageal varices develop in 30% of the patients with compensated cirrhosis and 60-70% of the patients with decompensated cirrhosis. Varice development incidence is around 4-12% in cirrhotic patients without varices. Esophageal variceal hemorrhage has high recurrence, mortality, and morbidity rates requiring immediate medical treatment and these constitute approximately 10% of upper gastrointestinal bleeding, which is one of the major causes of mortality in patients with cirrhosis. Bleeding develops in 30% of the cirrhotic patients with esophageal varices diagnosed during endoscopy. The mortality of the first bleeding episode ranges from 25 to 70% and after the first bleeding episode rebleeding occurs at a rate of 75-80% in six to twelve months. Variceal diameter, grade, degree of red dots, and cirrhosis are among the factors that increase the risk of variceal bleeding. The risk of bleeding in Grade 1 varices is 8% and a higher grade increases the risk of bleeding four to five folds. Pharmacological endoscopic and antibiotic treatment constitutes the basis for esophageal variceal bleeding treatment. In this study, we aimed to evaluate the current approaches to esophageal variceal bleeding.Öğe Cytoprotective effects of amifostine, ascorbic acid and N-acetylcysteine against methotrexate-induced hepatotoxicity in rats(Baishideng Publishing Group Inc, 2014) Akbulut, Sami; Elbe, Hulya; Eris, Cengiz; Dogan, Zumrut; Toprak, Gulten; Otan, Emrah; Erdemli, ErmanAIM: To investigate the potential role of oxidative stress and the possible therapeutic effects of N-acetyl cysteine (NAC), amifostine (AMF) and ascorbic acid (ASC) in methotrexate (MTX)-induced hepatotoxicity. METHODS: An MTX-induced hepatotoxicity model was established in 44 male Sprague Dawley rats by administration of a single intraperitoneal injection of 20 mg/kg MTX. Eleven of the rats were left untreated (Model group; n = 11), and the remaining rats were treated with a 7-d course of 50 mg/kg per day NAC (MTX + NAC group; n = 11), 50 mg/kg per single dose AMF (MTX + AMF group; n = 11), or 10 mg/kg per day ASC (MTX + ASC group; n = 11). Eleven rats that received no MTX and no treatments served as the negative control group. Structural and functional changes related to MTX- and the various treatments were assessed by histopathological analysis of liver tissues and biochemical assays of malondialdehyde (MDA), superoxide dismutase (SOD), catalase, glutathione (GSH) and xanthine oxidase activities and of serum levels of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase and total bilirubin. RESULTS: Exposure to MTX caused structural and functional hepatotoxicity, as evidenced by significantly worse histopathological scores [median (range) injury score: control group: 1 (0-3) vs 7 (6-9), p = 0.001] and significantly higher MDA activity [409 (352-466) nmol/g vs 455.5 (419-516) nmol/g, p < 0.05]. The extent of MTX-induced perturbation of both parameters was reduced by all three cytoprotective agents, but only the reduction in hepatotoxicity scores reached statistical significance [4 (3-6) for NAC, 4.5 (3-5) for AMF and 6 (5-6) for ASC; p = 0.001, p = 0.001 and p < 0.005 vs model group respectively]. Exposure to MTX also caused a significant reduction in the activities of GSH and SOD antioxidants in liver tissues [control group: 3.02 (2.85-3.43) mu mol/g and 71.78 (61.88-97.81) U/g vs model group: 2.52 (2.07-3.34) mu mol/g and 61.46 (58.27-67.75) U/g, p < 0.05]; however, only the NAC treatment provided significant increases in these antioxidant enzyme activities [3.22 (2.54-3.62) mu mol/g and 69.22 (61.13-100.88) U/g, p < 0.05 and p < 0.01 vs model group respectively]. CONCLUSION: MTX-induced structural and functional damage to hepatic tissues in rats may involve oxidative stress, and cytoprotective agents (NAC > AMF > ASC) may alleviate MTX hepatotoxicity. (C) 2014 Baishideng Publishing Group Inc. All rights reserved.Öğe Diaphragmatic Hernia Following Donor Hepatectomy(Lippincott Williams & Wilkins, 2016) Koc, Cemalettin; Ince, Volkan; Otan, Emrah; Ersan, Veysel; Barut, Bora; Baskiran, Adil; Ozdemir, Fatih[Abstract Not Available]Öğe Diaphragmatic hernias after pediatric liver transplantation: Experience of a high-volume transplant center(Wiley, 2020) Karakas, Serdar; Sahin, Tevfik Tolga; Kutluturk, Koray; Otan, Emrah; Baskiran, Adil; Sarici, Kemal Baris; Varol, IlknurDiaphragmatic hernias (DHs) are rare complications after pediatric liver transplantation (PLT). It is now widely accepted that DHs after liver transplantation (LT) is a pediatric related condition. PLTs (under of age 18) performed between January 2013 and June 2019 at Malatya Inonu University Institute of Liver Transplantation were retrospectively scanned. Study group consisting DHs and a control group were compared. Among 280 PLTs, 8 of them were complicated with DHs (%2.9). Median age of the patients with DH was 3.0 (0.8-9.5) years. Median graft recipient weight ratio was 2.5 (0.9-4.4). Five patients were below 5th percentiles in terms of pediatric weight growth chart at the time of LT. Also, 6 patients were below 5th percentiles in terms of pediatric height growth chart. There was no statistical difference between study and control groups. There are many risk factors mentioned in literature that may be primarily responsible for DHs after PLT. These factors are left lobe and large-for-size grafts, malnutrition, trauma or diathermy of diaphragmatic nerve and vessels and immunosuppressants. In our study, we could not specify any reason that differs in DHs. In our aspect, narrow diaphragma and thorax are exposed to high intra-abdominal pressure from abdomen. Large-for-size grafts, which are specific to children, also may contribute to this affect. Excessive diathermy and trauma to diaphragmatic collaterals may aggravate the risk of DH. More patients are needed to make an exact conclusion, in order to evaluate with comparable study on this aspect.Öğe Early endoscopic retrograde cholangiopancreatography after laparoscopic cholecystectomy can strain the occurrence of trocar site hernia(Baishideng Publishing Group Inc, 2014) Sumer, Fatih; Kayaalp, Cuneyt; Yagci, Mehmet Ali; Otan, Emrah; Kocaaslan, HuseyinThis study reports a 69-year-old, obese, female patient presenting with a biliary leakage after laparoscopic cholecystectomy for cholelithiasis. Closure of the umbilical trocar site had been neglected during the laparoscopic cholecystectomy. Early, on postoperative day five, endoscopic retrograde cholangiopancreatography (ERCP) requirement after laparoscopic cholecystectomy resolved the biliary leakage problem but resulted with a more complicated clinical picture with an intestinal obstruction and severe abdominal pain. Computed tomography revealed a strangulated hernia from the umbilical trocar site. Increased abdominal pressure during ERCP had strained the weak umbilical trocar site. Emergency surgical intervention through the umbilicus revealed an ischemic small bowel segment which was treated with resection and anastomosis. This report demonstrates that negligence of trocar site closure can result in very early herniation, particularly if an endoscopic intervention is required in the early postoperative period.(C) 2014 Baishideng Publishing Group Inc. All rights reserved.Öğe Economic growth leads to increase of obesity and associated hepatocellular carcinoma in developing countries(Elsevier Espana, 2016) Seydel, G. Seyda; Kucukoglu, Ozlem; Altinbas, Akif; Demir, O. Oguz; Yilmaz, Sezai; Akkiz, Hikmet; Otan, EmrahHepatocellular carcinoma (HCC) is the most common type of primary liver cancer and the third leading cause of cancer related death worldwide. In recent years, the prevalence of HCC has increased in both developing and developed countries. Most HCC cases develop in the presence of advanced chronic liver disease related to viral hepatitis. In particular hepatitis B virus and hepatitis C virus infections are considered as major HCC risk factors worldwide. However, current studies provide strong evidence for increasing numbers of HCC in nonalcoholic fatty liver disease (NAFLD). NAFLD represents the hepatic manifestation of metabolic syndrome which is based on obesity and insulin resistance. Epidemiologic data clearly demonstrates that NAFLD and obesity-related disorders are significant risk factors for tumor development in general and HCC in particular. As a consequence of life style changes towards higher calorie intake and less exercise, obesity and metabolic syndrome are spreading all over the world. Due to this increase in obesity and metabolic syndrome NAFLD-related HCC will become a major health care problem in the future. In conclusion, better understanding of the impact of NAFLD and obesity in the development of HCC will improve our treatment strategies of HCC and allow preventive measures.Öğe Effects of antioxidant agents against cyclosporine-induced hepatotoxicity(Academic Press Inc Elsevier Science, 2015) Akbulut, Sami; Elbe, Hulya; Eris, Cengiz; Dogan, Zumrut; Toprak, Gulten; Yalcin, Erhan; Otan, EmrahBackground: To investigate the potential protective antioxidant role of ursodeoxycholic acid (UDCA), melatonin, and allopurinol treatment in cyclosporine (CsA)-induced hepatotoxicity. Methods: Hepatotoxicity was established in Sprague-Dawley rats by daily administration of CsA. Treatment groups were additionally administered UDCA, melatonin, or allopurinol treatments. Rats that received no CsA and no treatments served as a control group. Liver samples from each group were examined by histopathologic analysis to determine the effects of CsA treatment on liver morphology. Biochemical assays were also used to determine the effect of CsA treatment on liver function, in the presence or absence of UDCA, melatonin, or allopurinol. Results: CsA treatment induced hepatotoxicity, resulting in sinusoidal dilatation, congestion, infiltration, hydropic degeneration, and loss of glycogen storage in the liver. From a molecular perspective, the CsA treatment increased levels of malondialdehyde (MDA) levels, decreased levels of reduced glutathione and xanthine oxidase, and decreased activities of superoxide dismutase and catalase. The CsA treatment also resulted in decreased serum total antioxidant capacity, whereas alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, total bilirubin levels, and total oxidant status were increased. Treatment with UDCA, melatonin, or allopurinol reduced the CsA-induced histopathologic changes, as compared with CsA-treated samples. In addition, UDCA, melatonin, or allopurinol treatment mitigated the CsA-induced effects on glutathione and MDA levels, and on superoxide dismutase and catalase activities, as well as reduced the CsA-mediated perturbations in serum levels of total antioxidant capacity, total oxidant status, and alkaline phosphatase. Conclusions: UDCA, allopurinol, and melatonin may each help to protect against CsA-induced damage to liver tissues, possibly through effects on the antioxidant system. (C) 2015 Elsevier Inc. All rights reserved.Öğe En Masse Resection of Pancreas, Spleen, Celiac Axis, Stomach, Kidney, Adrenal, and Colon for Invasive Pancreatic Corpus and Tail Tumor(Hindawi Ltd, 2013) Kutluturk, Koray; Alam, Abdul Hamid; Kayaalp, Cuneyt; Otan, Emrah; Aydin, CemalettinProviding a more comfortable life and a longer survival for pancreatic corpus/tail tumors without metastasis depends on the complete resection. Recently, distal pancreatectomy with celiac axis resection was reported as a feasible and favorable method in selected pancreatic corpus/tail tumors which had invaded the celiac axis. Additional organ resections to the celiac axis were rarely required, and when necessary it was included only a single extra organ resection such as adrenal or intestine. Here, we described a distal pancreatic tumor invading most of the neighboring organs-stomach, celiac axis, left renal vein, left adrenal gland, and splenic flexure were treated by en bloc resection of all these organs. The patient was a 60-year-old man without any severe medical comorbidities. Postoperative course of the patient was uneventful, and he was discharged on postoperative day eight without any complication. Histopathology and stage of the tumor were adenocarcinoma and T4 N1 M0, respectively. Preoperative back pain of the patient was completely relieved in the postoperative period. As a result, celiac axis resection for pancreatic cancer is an extensive surgery, and a combined en masse resection of the invaded neighboring organs is a more extensive surgery than the celiac axis resection alone. This more extensive surgery is safe and feasible for selected patients with pancreatic cancer.Öğe Evaluation of Early Postoperative Neurological Complications Following Living Donor Liver Transplantation(GALENOS YAYINCILIK, 2015-03) Otan, Emrah; Aydın, Cemalettin; Yonder, Hüseyin; Kayaalp, Cüneyt; Kaplan, Yüksel; Yılmaz, SezaiIntroduction: Liver transplantation is one of the best treatment options for end-stage liver disease. In Turkey, living donor liver transplantation (LDLT) is performed more frequently than cadaveric transplantation, because organ donation is unpopular in our country. Neurological complications contribute to poor postoperative outcomes after liver transplantation. In the present study, we aimed to evaluate the outcomes of LDLT patients in whom such complications developed early during postoperative follow-up in the intensive care unit. Methods: Of 217 LDLTs performed between August 2011 and August 2012, neurology consultations were arranged for 29 patients (13.36%) because of development of new-onset neurological symptoms and/or findings in patients with neurologically uneventful preoperative histories. We retrospectively collected data on age, gender, primary disease, Model for End-Stage Liver Disease (MELD) score, and postoperative hospitalization duration of those who survived. The indications for neurological consultation and diagnoses were categorized into acute confusion/encephalopathy, epileptic seizures, leukoencephalopathy, and focal neurological deficits. The immunosuppressive treatment regimens prescribed were also considered. The outcomes of the 2 groups (with and without neurological complications) were compared. Results: The mean patient age was 44.52 +/- 16.24 years, and males predominated (65.5%, n=19). Acute confusion/encephalopathy was the most frequent complication (62.1%, n=18), followed by epileptic seizures (27.6%, n=8), cerebrovascular disease (6.9%, n=2), and leukoencephalopathy (3.4%, n=1). Statistically significant between-group differences in age (44.5 +/- 16.2 vs. 34.33 +/- 20.98 years; p<0.001), and proportions of patients with a disease of viral etiology (55.17% vs. 35.63%, p<0.05), were evident. Mortality was significantly higher in the group with neurological complications (65.5% vs. 37.32%, p<0.05). The duration of postoperative hospitalization was also significantly longer in this group (29.80 +/- 15.04 vs. 10.00 +/- 5.47 days; p<0.05). Conclusion: Mortality was significantly higher and the duration of postoperative hospitalization significantly longer in LDLT patients with new-onset neurological complications than in those without such complications.Öğe Evaluation of Liver Function Tests for Living Liver Donors in Postoperative Course(Lippincott Williams & Wilkins, 2015) Aydin, Cemalettin; Akbulut, Sami; Otan, Emrah; Karakas, Serdar; Dirican, Abuzer; Kayaalp, Cuneyt; Colak, Cemil[Abstract Not Available]Öğe Extra-Corporeal Membrane Oxygenation after Living Related Liver Transplantation.(Wiley-Blackwell, 2014) Gedik, Ender; Otan, Emrah; Celik, Reha M.; Disli, Olcay M.; Aydin, Cemalettin; Erdil, Nevzat; Kutlu, Ramazan[Abstract Not Available]Öğe Extracorporeal Membrane Oxygenation After Living-Related Liver Transplant(Baskent Univ, 2015) Gedik, Ender; Celik, Muhammet Reha; Otan, Emrah; Disli, Olcay Murat; Erdil, Nevzat; Bayindir, Yasar; Kutlu, RamazanVarious types of extracorporeal membrane oxygenation methods have been used in liver transplant operations. The main indications are portopulmonary or hepatopulmonary syndromes and other cardiorespiratory failure syndromes that are refractory to conventional therapy. There is little literature available about extracorporeal membrane oxygenation, especially after liver transplant. We describe our experience with 2 patients who had living-related liver transplant. A 69-year-old woman had refractory aspergillosis pneumonia and underwent pumpless extracorporeal lung assist therapy 4 weeks after liver transplant. An 8-month-old boy with biliary atresia underwent urgent liver transplant; he received venoarterial extracorporeal membrane oxygenation therapy on postoperative day 1. Despite our unsuccessful experience with 2 patients, extracorporeal membrane oxygenation and pumpless extracorporeal lung assist therapy for liver transplant patients may improve prognosis in selected cases.
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