1. Hand and Upper Limb Centre University of Western Ontario, 268 Grosvenor Street, London, Ontario N6A 4L6, Canada.
2. Harbour City Medical Centre, 102-1125 Dufferin Crescent, Nanaimo, British Columbia V9S 2B5, Canada.
3. The Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA.