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Connett JE, Murray RP, Buist AS, Wise RA, Bailey WC, Lindgren PG, Owens GR; Lung Health Study Research Group.Connett JE, et al. Among authors: lindgren pg.Am J Epidemiol. 2003 Jun 1;157(11):973-9. doi: 10.1093/aje/kwg083.Am J Epidemiol. 2003.PMID: 12777360Clinical Trial.
Wise RA, Kanner RE, Lindgren P, Connett JE, Altose MD, Enright PL, Tashkin DP; Lung Health Study Research Group.Wise RA, et al. Among authors: lindgren p.Chest. 2003 Aug;124(2):449-58. doi: 10.1378/chest.124.2.449.Chest. 2003.PMID: 12907528Clinical Trial.