1. Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare, Tokyo, Japan
2. Department of Orthopaedic & Traumatology, Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong SAR, China
3. Pro-Mano, Hand Surgery and Rehabilitation, Treviso, Italy
4. Hand Surgery Unit, Orthopadic and Trauma Department, Hospital Universitario Infanta Leonor, Madrid, Spain
5. Division of Hand Surgery, Dep of Orthopedics, Østfold Hospital Trust, Moss, Norway