TY - JOUR T1 - Vancouver, Varley, Vanderpant JF - Canadian Medical Association Journal JO - CMAJ SP - 1570 LP - 1570-b VL - 161 IS - 12 A2 - , Y1 - 1999/12/14 UR - http://www.cmaj.ca/content/161/12/1570.3.abstract ER -