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Silkoff PE, Martin D, Pak J, Westcott JY, Martin RJ.Silkoff PE, et al.Chest. 2001 Apr;119(4):1049-55. doi: 10.1378/chest.119.4.1049.Chest. 2001.PMID: 11296168
Silkoff PE, Stevens A, Pak J, Bucher-Bartelson B, Martin RJ.Silkoff PE, et al.Chest. 1999 Sep;116(3):754-9. doi: 10.1378/chest.116.3.754.Chest. 1999.PMID: 10492283