Rhys H. Thomas, BSc, FRCS(Orth); Timothy R. Daniels, MD, FRCS(C); Division of Orthopaedic Surgery, St. Michael's Hospital and University of Toronto, Suite 800, 55 Queen Street East, Toronto, ON M5C 1R6, Canada. E-mail address for R.H. Thomas: [email protected] E-mail address for T.R. Daniels: [email protected]