Dr. Ho-Seong Han , MD, MS (Gen Surg), PhD, is Professor at the Seoul National University Hospital and Chairman of Department of Surgery at the Seoul National University Bundang Hospital. Prof. Han graduated with MD from Seoul National University and received his surgical qualification in 1989. From 1989 to 1993, he became the Assistant Professor at Gyeongsang National University Hospital and received PhD in 1993 at Seoul National University, College of Medicine. From 1993 to 2003, he worked in Ewha Womans University Mokdong Hospital as Assistant and Associate Professor while also was Chief and Chairman of Department of Surgery. From 2003, he started to work as current position. He is actively involved in both experimental and clinical research. He published numerous scientific publications and serves on academic advisory boards.