Obando, Jorge, Duke University Medical Center. Durham, VA, USA
Obara, Katsutoshi, Department of Endoscopy, Fukushima Medical University School of Medicine. Fukushima, Japan
Oberstein, Paul E, Columbia University College of Physicians and Surgeons at New York Presbyterian Hospital. New York, NY, USA
Oberstein, Paul Eliezer, Columbia University College of Physicians and Surgeons at New York Presbyterian Hospital. New York, NY, USA
Ocal, Idris T, Department of Laboratory Medicine and Pathology, Mayo Clinic. Scottsdale, AZ, USA
Ocal, Serkan, Department of Gastroenterology, Baskent University. Ankara, Turkey
Oda, Yoshinao, Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University. Fukuoka, Japan
Ofer, Amos, Division of Invasive Radiology, Rambam Health Care Center. Haifa, Israel
Ogawa, Kohei, Department of Hepato-Pancreato-Biliary Surgery, Kyoto University Hospital. Kyoto, Japan
Ogawa, Masami, Tokai University School of Medicine. Isehara, Japan
Ogawa, Michio, Kaizuka City Hospital, Osaka, Japan
Ogbonna, Onyekachi Henry, Tufts University School of Medicine. Boston, MA, USA
Ogbonnaya, Eleazu Chinedum, National Root Crops Research Institute. Umudike, Nigeria
Ogston, Simon, Department of Epidemiology, University of Dundee. Dundee, United Kingdom
Ogunbameru, Ayorinde, Department of Internal Medicine, Unity Health System. Rochester, NY, USA
Oh, Sun Young, Department of Hematology/Oncology and Experimental Therapeutics, Tufts University School of Medicine. Boston, MA, USA
Ohara, Hirotaka, Department of Community-based Medical Education, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
Ohara, Hirotaka, Department of Community-Based Medical Education, Nagoya City University Graduate School of Medical Sciences. Nagoya, Japan
Ohira, Hiromasa, Division of Medicine, Department of Gastroenterology and Rheumatology, Fukushima Medical University School of Medicine. Fukushima, Japan
Ohnishi, Hirohide, Department of Gastroenterology, Akita University Graduated School of Medicine. Akita, Japan
Ohtsubo, Koushiro, Division of Medical Oncology, Cancer Research Institute, Kanazawa University. Kanazawa, Japan
Ohtsuka, Takao, Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University. Fukuoka, Japan
Ohuchida, Kenoki, Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University. Fukuoka, Japan
Ohzato, Hiroki, Department of Surgery, Sakai Municipal Hospital. Osaka, Japan
Ohzato, Hiroki, Department of Surgery Sakai Municipal Hospital 1-1-1, Minamiyasui-cho, Sakai-ku Sakai, Osaka 590-0064 Japan Phone: +81-72.221.1700 Fax: +81-72.225.3303
Ohzawa, Kouji, Third Department of Internal Medicine, Toyama Medical and Pharmaceutical University. Toyama, Japan
Oikonomopoulos, Georgios M, Second Oncology Department, “St. Savvas” Anticancer Hospital. Athens, Greece
Oikonomopoulos, Georgios Michael, Second Oncology Clinic, St. Savvas Anticancer Hospital. Athens, Greece
Oikonomopoulos, Georgios Michael, Second Oncology Department, St. Savvas Anticancer Hospital. Athens, Greece
Ojeda, Vanesa, Department of Digestive Diseases, Dr. Negrín University Hospital. Las Palmas de Gran Canaria, Spain
Okabayashi, Takehiro, Department of Gastroenterological Surgery, Kochi Health Sciences Center. Kochi, Japan
Okabe, Yoshinobu, Kurume University School of Medicine
Okada, Katsuya, Department of Gastroenterological Surgery, Saitama International Medical Center, Saitama Medical University. Saitama, Japan
Okafor, Polycarp, Michael Okpara University of Agriculture. Umudike, Nigeria
Okamoto, Kojun, Department of Gastroenterological Surgery, Saitama International Medical Center, Saitama Medical University. Saitama, Japan
Okawa, Luciano, Gastrointestinal Endoscopy Unit, University of São Paulo. São Paulo, Brazil
Okazaki, Kazuichi, Third Department of Internal Medicine, Kansai Medical University. Osaka, Japan
Okumura, Fumihiro, Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences. Nagoya, Japan
Okuno, Masashi, Department of Surgery, Kansai Medical University, Hirakata Hospital. Shinmachi, Hirakata, Japan
Oláh, Attila, Petz Aladár Teaching Hospital. Gyor, Hungary
Oláh, Attila, Petz Aladár Teaching County Hospital. Gyõr, Hungary
Olde Damink, Steven W M
Olgun, Deniz Cebi, Cerrahpasa Medical Faculty, Istanbul University. Istanbul, Turkey
Oliva, Catalina, General Surgery Department, Madrid Sanchinarro University Hospital, San Pablo University. Madrid, Spain
Olivares, Sergio, General Surgery Department, Madrid Sanchinarro University Hospital, San Pablo University. Madrid, Spain
Olivares, Sergio, Department of General Surgery, Madrid Norte Sanchinarro San Pablo University Hospital. Madrid, Spain
Oliveira-Cunha, Melissa
Olyaee, Mojtaba, Division of Gastroenterology, Department of Medicine, University of Kansas Medical Center. Kansas City, KS, USA
Omori, Takeshi, Department of Surgery, Osaka Police Hospital. Osaka, Japan
Ong, Evan S, Department of Surgery, The University of Arizona. Tucson, AZ, USA
Onishi, Yoshifumi, Division of Gastroenterology, Shizuoka Medical Center. Shimizucho, Suntogun, Shizuoka, Japan
Ono, Hiroyuki, Division of Endoscopy, Shizuoka Cancer Center. Nagaizumi, Suntogun, Shizuoka, Japan
Ono, Michihiro, Department of Medical Oncology and Hematology, Sapporo Medical University School of Medicine. Sapporo, Japan
Oono, Takamasa, Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University. Fukuoka, Japan
Opocher, Giuseppe, Department of Oncology, Veneto Institute of Oncology. Padua, Italy
Oppong, Kofi, HPB Unit, Freeman Hospital, Royal Victoria Infirmary. Newcastle upon Tyne, United Kingdom
Oppong, Kofi, Department of Gastroenterology, Freeman Hospital. Newcastle upon Tyne, United Kingdom
Orchard-Webb, David, University of Leeds. Leeds, UK
Orita, Hajime, Department of Surgery, Shizuoka Hospital School of Medicine, Juntendo University. Shizuoka, Japan
Oropeza-Vail, Melissa M
Orvieto, Enrico, Pathology, University of Padua. Padua, Italy
Osada, Shinji, Surgical Oncology, Gifu University School of Medicine. Gifu city
Osaka, Yoshio, Department of Surgery, Omihachiman Medical Community Center. Omihachiman, Shiga, Japan
Osiro, Stephen, Department of Medicine, Woodhull Medical and Mental Health Center. Brooklyn, NY, USA
Osiro, Stephen, Department of Medicine, Woodhull Medical Center. Brooklyn, NY, USA
Osman, Mahasin, Division of Biology and Medicine (MPPB), Warren Alpert Medical School, Brown University. Providence, RI, USA
Ostroff, James W, Division of Gastroenterology and Hepatology, University of California - San Francisco. San Francisco, CA, USA
Osuga, Takahiro, Department of Medical Oncology and Hematology, Sapporo Medical University School of Medicine. Sapporo, Japan
Otoch, José Pinhata
Ove, Roger, Mitchell Cancer Institute, University of South Alabama. Mobile, AL, USA
Overbeck-Zubrzycka, Dorota, Department of Hepato-Pancreato-Biliary Surgery, The Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust. Newcastle upon Tyne, Tyne and Wear, United Kingdom
Oymaci, Erkan, Department of General Surgery, Izmir Bozyaka Training and Research Hospital. Izmir, Turkey
Ozmen, Tolga, Department of General Surgery, Marmara University Pendik Teaching and Research Hospital. Marmara, Turkey
Öztaş, Erkin, Department of Gastroenterology, “Turkiye Yuksek Ihtisas” Hospital. Ankara, Turkey