Hong, Suk-Kyung, M.D., Ph.D., Professor, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.
Kim, Dong Kwan, M.D., Ph.D., Professor, Department of Thoracic & Cardiovascular surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.
Jeon, Sang Ryong, M.D., Ph.D., Professor, Department of Neurosurgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.