Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea, Republic of
Division of Gastroenterology, Department of Internal Medicine, Yonsei Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea, Republic of
Department of Surgery, Yonsei University Colleage of Medicine,, Seoul, Korea, Republic of
Sevrance hospital, Department of General surgery, Seoul, Korea, Republic of
Ji Yeong An, Seoul, Korea, Republic of
Department of Urology, Urological Science Institute, Yonsei University, Colleage of Medicine, Seoul, Korea, Republic of
Department of Surgery, Yonsei University College of Medicine, Severance Hospital, Seoul, Korea, Republic of
Severance hospital, Seoul, Korea, Republic of
Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea, Republic of
department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea, Republic of
Severance Hospital, Seoul, Korea, Republic of