RT Journal Article SR Electronic T1 Authors’ response JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1408 OP 1408 DO 10.1503/cmaj.111-2074 VO 183 IS 12 A1 Singh, Sonal A1 Loke, Yoon K. A1 Spangler, John G. A1 Furberg, Curt D. YR 2011 UL http://www.cmaj.ca/content/183/12/1408.abstract