Authors: Mark Gilbert; Judy MacDonald; Dan Gregson; Jennifer Siushansian; Kunyan Zhang; Sameer Elsayed; Kevin Laupland; Tom Louie; Karen Hope; Michael Mulvey; John Gillespie; Diane Nielsen; Virginia Wheeler; Marie Louie; Agnes Honish; Gloria Keays; John Conly Journal: CMAJ Date: 2006-06-27 Impact factor: 8.262