[1]
Hedenström H. and Wegener T. 1988. Lack of Correlation between the Grade of Methacholine-Induced Bronchial Hyperreactivity and Ipratropium Bronchodilation in Asthmatics. Upsala Journal of Medical Sciences. 93, 1 (Sep. 1988), 71-80. DOI:https://doi.org/10.1517/03009734000000040.