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Hecht A, Ma S, Porszasz J, Casaburi R; COPD Clinical Research Network.Hecht A, et al. Among authors: casaburi r.COPD. 2009 Apr;6(2):121-9. doi: 10.1080/15412550902755044.COPD. 2009.PMID: 19378225Free PMC article.Clinical Trial.
Somfay A, Pórszász J, Lee SM, Casaburi R.Somfay A, et al. Among authors: casaburi r.Chest. 2002 Feb;121(2):393-400. doi: 10.1378/chest.121.2.393.Chest. 2002.PMID: 11834648Clinical Trial.
Emtner M, Porszasz J, Burns M, Somfay A, Casaburi R.Emtner M, et al. Among authors: casaburi r.Am J Respir Crit Care Med. 2003 Nov 1;168(9):1034-42. doi: 10.1164/rccm.200212-1525OC. Epub 2003 Jul 17.Am J Respir Crit Care Med. 2003.PMID: 12869359Clinical Trial.