Comparison of addition of salmeterol to inhaled steroids with doubling of the dose of inhaled steroids.
Am J Respir Crit Care Med. 1996 May;153(5):1481-8. doi: 10.1164/ajrccm.153.5.8630590.
Am J Respir Crit Care Med. 1996.
PMID: 8630590
Clinical Trial.