Prolonged effect of tiotropium bromide on methacholine-induced bronchoconstriction in asthma.
Am J Respir Crit Care Med. 1996 Oct;154(4 Pt 1):876-80. doi: 10.1164/ajrccm.154.4.8887578.
Am J Respir Crit Care Med. 1996.
PMID: 8887578
Clinical Trial.