Helicobacter Research Laboratory, Marshall Centre, University of Western Australia

Corporació Sanitària Universitària Parc Taulí. Universitat Autònoma de Barcelona

Seoul National University College of Medicine

Brown University

Senior Lecturer. La Trobe University, Melbourne, Australia.

Professor Emeritus, University of Tokyo; Lecturer, Kyorin University

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Institute of Clinical Medicine, National Cheng Kung University

Professor of Medicine and Public Health, University of Alberta

川崎医科大学　消化管内科学