PT - JOURNAL ARTICLE AU - Elizabeth A McNamara-Aslin AU - Douglas M Aslin TI - Respiratory Care. DP - 2007 May 01 TA - Respiratory Care PG - 646--647 VI - 52 IP - 5 4099 - http://rc.rcjournal.com/content/52/5/646.short 4100 - http://rc.rcjournal.com/content/52/5/646.full