RT Journal Article SR Electronic T1 Acne JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1497 OP 1497 DO 10.1503/cmaj.090639 VO 184 IS 13 A1 Anatoli Freiman A1 Benjamin Barankin YR 2012 UL http://www.cmaj.ca/content/184/13/1497.abstract