RT Journal Article SR Electronic T1 The authors’ response JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 616 OP 616-b DO 10.1503/cmaj.109-2027 VO 181 IS 9 A1 Padmaja Subbarao A1 Piush J. Mandhane A1 Malcolm R. Sears YR 2009 UL http://www.cmaj.ca/content/181/9/616.3.abstract