Alan N Barkun1, Loren Laine2, Grigorios I Leontiadis3, Marc Bardou4. 1. McGill University, Montreal, Quebec, Canada (A.N.B.). 2. Yale School of Medicine, New Haven, Connecticut (L.L.). 3. McMaster University, Hamilton, Ontario, Canada (G.I.L.). 4. Dijon-Bourgogne University Hospital, Dijon, France (M.B.).