Dong-Wan Seo is world renowned expert on pancreatobiliary endoscopy and a specialist in pancreatobiliary disease. He is currently a Professor and the Chairman of Department of Internal Medicine University of Ulsan Medical College, Asan Medical Center which is the largest teaching hospital in Korea. He published more than 300 articles in English literature and involved in many academic societies including WEO, ASGE, & KSGE.