RT Journal Article SR Electronic T1 Need to lobby for access to asthma medications JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1263 OP 1264 DO 10.1503/cmaj.070404 VO 176 IS 9 A1 Silversides, Ann YR 2007 UL http://www.cmaj.ca/content/176/9/1263.abstract