RT Journal Article SR Electronic T1 Plan B available to women 18 and older in US JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 862 OP 862 DO 10.1503/cmaj.061164 VO 175 IS 8 A1 Milan Korcok YR 2006 UL http://www.cmaj.ca/content/175/8/862.1.abstract