1. Department of Orthopedic Surgery, Suncheon Joongang Hospital, Suncheon, Korea
2. Department of Orthopedic Surgery, Ilsan Paik Hospital, College of Medicine, Inje University College of Medicine, Goyang, Korea
3. Department of Orthopedic Surgery, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea