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von Baum H, Welte T, Marre R, Suttorp N, Ewig S; CAPNETZ study group.von Baum H, et al. Among authors: ewig s.Eur Respir J. 2010 Mar;35(3):598-605. doi: 10.1183/09031936.00091809. Epub 2009 Aug 13.Eur Respir J. 2010.PMID: 19679601Free article.