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Borgen K, Koster B, Meijer H, Kuyvenhoven V, van der Sande M, Cobelens F.Borgen K, et al. Among authors: cobelens f.Eur Respir J. 2008 Aug;32(2):419-25. doi: 10.1183/09031936.00136607. Epub 2008 Mar 19.Eur Respir J. 2008.PMID: 18353853Free article.
Erkens CG, Slump E, Verhagen M, Schimmel H, Cobelens F, van den Hof S.Erkens CG, et al. Among authors: cobelens f.Eur Respir J. 2016 Nov;48(5):1420-1428. doi: 10.1183/13993003.01157-2016. Epub 2016 Oct 6.Eur Respir J. 2016.PMID: 27799389Free article.