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Patel IS, Vlahos I, Wilkinson TM, Lloyd-Owen SJ, Donaldson GC, Wilks M, Reznek RH, Wedzicha JA.Patel IS, et al. Among authors: wedzicha ja.Am J Respir Crit Care Med. 2004 Aug 15;170(4):400-7. doi: 10.1164/rccm.200305-648OC. Epub 2004 May 6.Am J Respir Crit Care Med. 2004.PMID: 15130905Clinical Trial.