1. Department of Internal Medicine, Kyung Hee University School of Medicine, Director of the Education board of Korean Society of Gastroenterology, Seoul, Korea.
2. Department of Internal Medicine, Yonsei University College of Medicine, President of the Korean Society of Gastroenterology, Seoul, Korea.
3. Department of Internal Medicine, Korea University College of Medicine, Director of the Education Board of the Korean Association for the Study of the Liver, Seoul, Korea.
4. Department of Internal Medicine, Catholic University College of Medicine, The Catholic University of Korea, President of the Korean Association for the Study of the Liver, Seoul, Korea.
5. Department of Internal Medicine, Chonbuk National University College of Medicine, Director of the Education Board of the Korean Pancreatobiliary Association, Jeonju, Korea.
6. Department of Internal Medicine, Ulsan University College of Medicine, President of the Korean Pancreatobiliary Association, Ulsan, Korea.