Sung-Gyu Lee , MD, PhD, is the chair professor of surgery at the University of Ulsan College of Medicine and Asan Medical Center, and the president and CEO of Asan Healthcare System. As one of the world’s best-known experts in the field of liver transplantation, he has invented various techniques and protocols for transplanting liver from living donor to patient. Over the past 30 years, he has created a number of global records in the field of liver transplantation. He has the leading techniques in the technical innovation of LDLT, two-to-one dual liver transplantations, liver transplantation of different ABO blood types, and laparoscopic hepatectomy. His achievements in hepatobiliary and pancreatic surgery and liver transplantation have been internationally recognized. So far, he has published more than 400 academic papers.