1. Shoulder and Elbow Clinic, Department of Orthopaedic Surgery, Kyung Hee University School of Medicine, Seoul, Korea.
2. Shoulder and Elbow Clinic, Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University Hospital at Gangdong, Seoul, Korea.
3. Shoulder and Elbow Clinic, Department of Orthopaedic Surgery, Myongji Hospital, Goyang, Korea.