Severe exacerbations and decline in lung function in asthma.
Am J Respir Crit Care Med. 2009 Jan 1;179(1):19-24. doi: 10.1164/rccm.200807-1126OC. Epub 2008 Oct 31.
Am J Respir Crit Care Med. 2009.
PMID: 18990678
Clinical Trial.