Robert M. Szabo, MD, MPH 
Division of Plastic Surgery, Department of Orthopaedic Surgery, Hand and Upper Extremity Service, University of California, Davis, School of Medicine, 4860 Y Street, Suite 3800, Sacramento, CA 95817, USA
Joy C. MacDermid, BScPT, PhD 
Hand and Upper Limb Centre Clinical Research Laboratory, St. Joseph’s Health Centre, 268 Grosvenor Street, London, Ontario N6A 4L6, Canada
School of Rehabilitation Science, LB33, McMaster University, Institute for Applied Health Sciences, 1400 Main Street West, 4th Floor, Hamilton, Ontario L8S 1C7, Canada