Dr. Yang is a Professor of the Department of Surgery and Director at Seoul National University Hospital & Seoul National University College of Medicine. He is involved in several large-scale RCTs for gastric cancer treatment. He was a Korean PI of the REGATTA study (Phase III study for the role of gastrectomy in stage IV gastric cancer with a single incurable factor; a collaborative study between JCOG and KGCA). He is an investigator of the CLASSIC trial, KLASS (Korean Laparoscopic Gastrointestinal Surgery Study Group) trial, as well as the Korean PI of a phase II study for the role of neoadjuvant imatinib treatment in large gastric GIST (a collaborator study between Japan and Korea). He is the founding chairman of KLASS. His translational research interests are gastric carcinogenesis, DDS, familial gastric cancer, biomarkers, and developing a PDX model for gastric cancer. He is Chairman of Board of Directors, Korean Cancer Association, executive council member of IGCA, Honorary fellow of American Surgical Association, Honorary Member of European Surgical Association, Honorary International Fellow of Japanese Society of Endoscopic Surgery, and a member of Korea Korean Academy of Science and Technology (KAST). He is an editorial member of ‘Gastric Cancer’ (official journal of International Gastric Cancer Association), Asian Journal of Endoscopic Surgery, Annals of Surgery, etc. Dr. Yang gave about 300 invited lectures at international meetings and overseas institutes with occasional live demonstrations of gastrectomy (open, laparoscopic, or robotic).