1. Center for Shoulder, Elbow and Sports at Neon Orthopedic Clinic, Seoul, Korea.
2. Department of Orthopedic Surgery, Seoul Red-Cross Hospital, Seoul, Korea.
3. Department of Orthopedic Surgery, Konkuk University School of Medicine, Seoul, Korea.
4. Department of Orthopedic Surgery, Inje University Haeundae Paik Hospital, Busan, Korea.