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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- van der Palen J., Klein J. J., Kerkhoff A. H., van Herwaarden C. L. Evaluation of the effectiveness of four different inhalers in patients with chronic obstructive pulmonary disease. Thorax. 1995 Nov;50(11):1183–1187. doi: 10.1136/thx.50.11.1183. [DOI] [PMC free article] [PubMed] [Google Scholar]
