1 Department of Orthopedic Surgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, 20 Geumo-ro, Mulgeum-eup, Yangsan, Gyeongsangnam-do 626-770, South Korea.
2 Department of Orthopedic Surgery, Pusan National University Hospital, Busan, Pusan National University School of Medicine, South Korea.
3 Department of Orthopedic Surgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, 20 Geumo-ro, Mulgeum-eup, Yangsan, Gyeongsangnam-do 626-770, South Korea. Electronic address: dreami3e5t@pusan.ac.kr.