RT Journal Article SR Electronic T1 Delivery of 100%, 40%, and blow-by humidity did not differ for change in croup scores in children with moderate croup JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 142 OP 142 DO 10.1136/ebm.11.5.142 VO 11 IS 5 YR 2006 UL http://ebm.bmj.com/content/11/5/142.abstract AB