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Roiha HL, Kuehni CE, Zanolari M, Zwahlen M, Baldwin DN, Casaulta C, Nelle M, Frey U.Roiha HL, et al. Among authors: casaulta c.Eur Respir J. 2007 Feb;29(2):251-8. doi: 10.1183/09031936.00016106. Epub 2006 Oct 18.Eur Respir J. 2007.PMID: 17050555Free article.