Authors:
van Noord, JA
de Munck, DRAJ
Bantje, TA
Hop, WCJ
Akveld, MLM
Bommer, AL
Citation: Ja. Van Noord et al., Long-term treatment of chronic obstructive pulmonary disease with salmeterol and the additive effect of ipratropium, EUR RESP J, 15(5), 2000, pp. 878-885