TY - JOUR T1 - Puzzling result JF - Canadian Family Physician JO - Can Fam Physician SP - 761 LP - 761 VL - 57 IS - 7 AU - Christian Dufour Y1 - 2011/07/01 UR - http://www.cfp.ca/content/57/7/761.3.abstract N2 - ER -