1. Inha University Hospital, 65745, Incheon, Korea (the Republic of);
2. Sungkyunkwan University School of Medicine, Department of Orthopedic Surgery, Samsung Med Ctr, KangNam Gu, IrWon Dong 50, Seoul, Korea, Republic of, 15-710, , ;
3. The Catholic University of Korea College of Medicine, Seoul, Korea (the Republic of);
4. Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea (the Republic of);
5. Chungbuk National University Hospital, Cheongju, Korea (the Republic of);
6. Seoul Paik Hospital, Inje University, Seoul, Korea (the Republic of);
7. Jeonbuk National University Medical School, Jeonju, Korea (the Republic of);
8. Ewha Womans University Mokdong Hospital, Seoul, Korea (the Republic of);
9. Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea (the Republic of);
10. College of Medicine, Hanyang University, Seoul, Korea (the Republic of);
11. Kyungpook National University, Daegu, Korea (the Republic of);
12. Seoul National University Hospital, Seoul, Korea, Republic of;