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Content meets the Bookimed Editorial Policy and is medically reviewed by

Fahad Mawlood

Siegbert Rossol

  • 4.5 Good 57 reviews
  • 36 years of experience
  • accreditations:
  • Germany, Frankfurt am Main, Nordwest Clinic (Krankenhaus)
  • 36 years of experience specializing in gastroenterology – Dr. Rossol brings deep expertise in gastric ulcer treatment at Nordwest Clinic.

    • Performed 1,100+ procedures with focus on interventional sonography
    • Fellow of the European Board of Gastroenterology
    • Trained at King's College London's Institute of Liver Studies
    • Published in national and international medical journals
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Peter Schenker

  • 4.7 Excellent 65 reviews
  • 19 years of experience
  • Germany, Solingen, Medical Center in Solingen
  • Chief Surgeon at the Department of Surgery – introduced modern surgical methods with a focus on minimally invasive techniques, including robotics.

    • Specialist in visceral surgery with expertise in gastrointestinal oncology
    • Coordinator of the Pancreatic Cancer Centre (Oncocert)
    • Additional clinical specialization in minimally invasive and hernia surgery
    • Active researcher and lecturer at medical universities
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Hamdi Levent Doganay

  • 5 Excellent 1 review
  • 25 years of experience
  • Turkey, Istanbul, VM Medical Park Pendik Hospital
  • Professor Doganay brings over 25 years of experience of specialized gastroenterology experience, including leadership roles at top Turkish hospitals.

    • Board-certified in gastroenterology with subspecialty training
    • Former Clinic Chief at Ümraniye Training and Research Hospital
    • Editor for multiple hepatology journals including World Journal of Hepatology
    • Recipient of multiple research awards from Turkish Gastroenterology Association
    • Member of European and Asian liver research associations
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Dr Sanchez Yague

  • 4.4 Good 5 reviews
  • 27 years of experience
  • Spain, Marbella, Quirónsalud Marbella
  • Pioneer in Spain for submucosal endoscopic dissection – Dr Sanchez Yague introduced this advanced technique in Andalusia in 2011.

    • 27 years of experience' experience in gastroenterology
    • First professional worldwide to use the 15-mm AXIOS stent
    • Gold Medal recipient from Andalusian Society for Digestive Disease
    • Fellow of both American College of Gastroenterology and American Society for Gastrointestinal Endoscopy
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Yasar Tuna

  • 4.5 Good 6 reviews
  • 29 years of experience
  • Turkey, Antalya , Medical Park Antalya Hospital Complex
  • Specialized in gastroenterology with a PhD from Akdeniz University – Dr. Tuna focuses on complex gastric ulcer cases at Medical Park Antalya.

    • Over 29 years of experience of experience in gastroenterology
    • Trained at Akdeniz University – a leading center for digestive health
    • Works at Antalya's only hospital with an Organ Transplant Center
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Muzaffer Al

  • 4.3 Good 4 reviews
  • 16 years of experience
  • Turkey, Istanbul, Büyük Anadolu Hospitals (BAH International)
  • Specializes in laparoscopic surgery for gastric ulcers with advanced training from Istanbul University.

    • Over 16 years of experience of experience in general surgery
    • Trained in laparoscopic antireflux surgery
    • Expertise in laparoscopic bariatric and oncological cancer surgery
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Benal Buyukgebiz

  • 5 Excellent 55 reviews
  • 32 years of experience
  • Turkey, Istanbul, Istanbul Florence Nightingale Hospital
  • Professor Benal Buyukgebiz specializes in pediatric gastroenterology, focusing on gastric ulcers in children at Istanbul Florence Nightingale Hospital.

    • Sub-specialty in Pediatric Gastroenterology from Dokuz Eylul University
    • Professor of Pediatrics with extensive academic and clinical experience
    • Author of research on gastrointestinal issues in children
    • Practices at a leading pediatric hospital in Istanbul
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Ferit Çelik

  • 16 years of experience
  • Turkey, İzmir, Medicalpoint International Hospital
  • Associate Professor Ferit Çelik specializes in advanced endoscopic treatments for digestive diseases at Bakırçay University Çiğli Training and Research Hospital.

    • Trained at Ege University Gastroenterology Department
    • Expert in endoscopic mucosal resection (EMR) for precise ulcer treatment
    • Member of Turkish Gastroenterology Association's ERCP working group
    • Performs diagnostic and therapeutic procedures including colonoscopy
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Shencan Acar

  • 5 Excellent 55 reviews
  • 16 years of experience
  • Turkey, Istanbul, Istanbul Florence Nightingale Hospital
  • Specializes in high-risk gastric ulcer cases at Istanbul Florence Nightingale Hospital – manages complex conditions with endoscopic precision.

    • Board-certified gastroenterologist with subspecialty training in GI bleeding
    • Authored 20+ peer-reviewed studies on GI emergencies and rare cases
    • Former department head at Giresun University's medical faculty
    • Expert in anticoagulant-related ulcer complications
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Omer Burcak Binicier

  • 14 years of experience
  • Turkey, İzmir, Medicalpoint International Hospital
  • Specializing in gastric ulcers with 14 years of experience in gastroenterology – Dr. Binicier brings deep expertise in both diagnosis and advanced endoscopic treatments.

    • Trained at Dokuz Eylül University, a leading institution for gastroenterology
    • Expert in endoscopic mucosal resection (EMR) and other precision techniques
    • Holds additional training from Korea University's Gastroenterology Department
    • Currently practices at Medicalpoint International Hospital in Izmir
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Seymur Aslanov

  • 8 years of experience
  • Turkey, İzmir, Medicalpoint International Hospital
  • Specialized in gastroenterology with a focus on gastric ulcers – Dr. Aslanov brings advanced endoscopic techniques to Medicalpoint International Hospital.

    • Subspecialized in gastroenterology at Ege University Faculty of Medicine Hospital
    • Skilled in endoscopic treatments like argon plasma coagulation and stenting
    • Member of the Izmir Medical Chamber
    • Handles complex cases including upper gastrointestinal bleeding
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Auala Hubert

  • 4.2 Good 13 reviews
  • 36 years of experience
  • accreditation:
  • Israel, Jerusalem, Hadassah Medical Center
  • Dr. Auala Hubert leads the Gastrointestinal Cancer Center at Hadassah Medical Center with 36 years of experience of oncology expertise.

    • Specializes in Medical Oncology & Radiotherapy
    • Head of Gastrointestinal Cancer Center
    • Board-certified in Oncology & Radiotherapy
    • Member of Israel Society of Clinical Oncology
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José Miguel Esteban Lopez-jamar

  • 5 Excellent 1 review
  • 19 years of experience
  • Spain, Madrid, Hospital Ruber Internacional
  • Dr. José Miguel Esteban López-Jamar is a gastroenterologist. He has led the Digestive Endoscopy and Digestive Diseases Units at Hospital Ruber Internacional since 2007. He has more than 20 years of experience. He is a Spanish pioneer in endoscopic ultrasound (EUS). His work covers diagnostic and interventional endoscopy. He uses innovative, minimally invasive techniques for complex gastrointestinal disease.

    He was Head of Endoscopy (2008–2012) and Head of Endoscopic Innovation (2012–2014) at Hospital Clínico San Carlos. He completed international training at AMC Amsterdam, Institut Paoli-Calmettes in Marseille, and Zhongshan Hospital in Shanghai. He holds an MD and a PhD from the Complutense University of Madrid. He is a specialist in gastroenterology. He takes part in multicenter European studies and clinical trials. He is a member of SEPD, SEED, and ESGE.

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Ahmet Omer Ozutemiz

  • 47 years of experience
  • Turkey, İzmir, Medicalpoint International Hospital
  • Prof. Dr. Ahmet Omer Ozutemiz specializes in gastroenterology with over 47 years of experience of experience, focusing on complex digestive system disorders.

    • Trained at Ege University – a leading institution for gastroenterology
    • Expert in endoscopic treatments for digestive system strictures
    • Sub-specialist in liver and pancreas diseases
    • Professor at Ege University with extensive academic contributions
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Rifaat Safadi

  • 4.2 Good 13 reviews
  • 38 years of experience
  • Israel, Jerusalem, Hadassah Medical Center
  • Professor Safadi specializes in liver diseases with a focus on immune modulation at Hadassah Medical Center.

    • Over 38 years of experience of experience in gastroenterology and hepatology
    • Trained in liver diseases at Sinai School of Medicine in New York
    • Head of the liver disease unit at Hadassah Medical Center
    • Published numerous articles in medical journals
    • Multiple award winner for research in liver fibrosis
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Dimitrios Giannakakis

  • 23 years of experience
  • Cyprus, Republic of Cyprus, German Medical Institute (GMI)
  • Dr. Giannakakis leads the Gastroenterology Department at the German Oncology Centre, specializing in gastric ulcer treatment.

    • 23 years of experience of clinical experience in gastroenterology
    • Specialized in Pathology and Gastroenterology
    • Worked at prestigious German hospitals including Klinikum Offenbach
    • Currently serves as Director in Limassol, Cyprus
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Cagdas Erdogan

  • 5 Excellent 1 review
  • 12 years of experience
  • Turkey, Istanbul, İstinye University Liv Hospital Topkapı
  • Dr. Cagdas Erdogan is a gastroenterologist at Ankara Etlik City Hospital. He trained in Internal Medicine and Gastroenterology. He earned his MD from Dokuz Eylul University. He completed his Internal Medicine residency from 2014 to 2019. He then completed a Gastroenterology fellowship at Ankara City Hospital from 2019 to 2022. His clinical focus includes advanced endoscopy (ERCP, EUS, EMR, ESD, POEM, EGD, colonoscopy, double-balloon enteroscopy), inflammatory bowel disease, and hepatology.

    He has about 40 publications. His work appears in The Turkish Journal of Gastroenterology, Scientific Reports, Endoscopy, and Digestive Diseases and Sciences. Notable studies address vedolizumab in IBD and prophylaxis for post-ERCP pancreatitis. He also reported a 13-year Crohn’s cohort comparing infliximab and adalimumab. Additional work covers outcomes with an adalimumab biosimilar and innovative endoscopic therapies (MCA via double-balloon enteroscopy, holmium laser for Bouveret syndrome, POEM for Zenker’s diverticulum, and ESD for esophageal papillomatosis).

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Gerhard Prager

  • 4.5 Good 19 reviews
  • accreditations:
  • Austria, Vienna, Vienna General Hospital (AKH)
  • Professor Prager has performed over 3,000 bariatric operations and is the President of IFSO-European Chapter, the leading European society for metabolic surgery.

    • Specializes in gastroenterology and all kinds of bariatric surgery
    • Head of the Obesity Outpatient Clinic at Vienna General Hospital (AKH)
    • Also leads the Metabolic Surgery Center at Confraternitaet Private Hospital
    • Member of multiple international surgical societies, including the American Society for Metabolic & Bariatric Surgery
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Nurana Guliyeva

  • 17 years of experience
  • Azerbaijan, Baku, Biological Medicine - Integrative Health Center Baku
  • Specializes in treating diseases of the stomach and intestines, including gastric ulcers, with a focus on integrative biological medicine approaches.

    • 17 years of experience of clinical experience in gastroenterology
    • Internship in viral hepatitis and gastroenterology at Ege University, Turkey
    • Member of the medical team at Biological Medicine - Integrative Health Center
    • Trained at Ankara Hacettepe Hospital
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Dr Arnulf Ferlitsch

  • 4.2 Good 21 reviews
  • 26 years of experience
  • Austria, Vienna, Döbling Private Hospital
  • Dr. Ferlitsch is a leading specialist in gastroenterology with multiple research awards and extensive training at top institutions.

    • Completed medical studies at the University of Vienna with training at UCLA and University of Pennsylvania
    • Specialized in gastroenterology and hepatology at Vienna General Hospital
    • Established and managed the hepatic hemodynamics laboratory at the Medical University of Vienna
    • Received multiple Best Abstract Awards from UEGW and other prestigious recognitions
    • Head of the Department for Internal Medicine I at Hospital of the Barmherzigen Brüder Vienna
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