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Boudewyns A, Punjabi N, Van de Heyning PH, De Backer WA, O'Donnell CP, Schneider H, Smith PL, Schwartz AR.Boudewyns A, et al.Chest. 2000 Oct;118(4):1031-41. doi: 10.1378/chest.118.4.1031.Chest. 2000.PMID: 11035674
Breugelmans JG, Ford DE, Smith PL, Punjabi NM.Breugelmans JG, et al. Among authors: punjabi nm.Am J Respir Crit Care Med. 2004 Sep 1;170(5):547-52. doi: 10.1164/rccm.200310-1421OC. Epub 2004 Jun 1.Am J Respir Crit Care Med. 2004.PMID: 15172895