1 Department of Orthopedic Surgery, Taipei Medical University Hospital, Taipei, Taiwan; Department of Orthopedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
2 Department of Orthopedic Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea.
3 Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan.
4 University of New Mexico School of Medicine, Albuquerque, NM, USA; Desert Institute for Spine Care, Phoenix, AZ, USA.
5 Department of Orthopedics, West China Hospital of Sichuan University, Chengdu, China.