RT Journal Article SR Electronic T1 Croup in children JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1317 OP 1323 DO 10.1503/cmaj.121645 VO 185 IS 15 A1 Bjornson, Candice L. A1 Johnson, David W. YR 2013 UL http://www.cmaj.ca/content/185/15/1317.abstract AB