1. Department of Orthopedic Surgery, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
2. Department of Orthopedic Surgery, Chungbuk National University Hospital, Cheongju, Korea
3. Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
4. Department of Orthopedic Surgery, The Catholic University of Korea, Bucheon St. Mary’s Hospital, Bucheon, Korea
5. Department of Orthopedic Surgery, Inje University Sanggye Paik Hospital, Seoul, Korea