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Watson L, Schouten JP, Löfdahl CG, Pride NB, Laitinen LA, Postma DS; European Respiratory Society Study on Chronic Obstructive Pulmonary Disease.Watson L, et al. Among authors: lofdahl cg.Eur Respir J. 2006 Aug;28(2):311-8. doi: 10.1183/09031936.06.00055805. Epub 2006 May 17.Eur Respir J. 2006.PMID: 16707516Free article.Clinical Trial.
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