1. Department of Hand Surgery, Schulthess Klinik, Zurich, Switzerland
2. Niigata Rheumatic Centre, Shibata, Japan
3. Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
4. Brisbane Hand and Upper Limb Research Institute, Brisbane Private Hospital, Brisbane, Queensland, Australia
5. Department of Orthopaedic Surgery, Groote Schuur Hospital, Cape Town, South Africa