Krishnan Jerry A, Nowak Richard, Davis Steven Q, Schatz Michael
Asthma and COPD Center, Department of Medicine, and Department of Health Studies, University of Chicago, 5841 S. Maryland Avenue, Chicago, IL 60637, USA.
J Emerg Med. 2009 Aug;37(2 Suppl):S35-41. doi: 10.1016/j.jemermed.2009.06.107.