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Kirschner N, Barr MS.Kirschner N, et al. Among authors: barr ms.Chest. 2010 Jan;137(1):200-4. doi: 10.1378/chest.09-0060. Epub 2009 Nov 20.Chest. 2010.PMID: 19505988
Barr MS.Barr MS.Med Care Res Rev. 2010 Aug;67(4):492-9. doi: 10.1177/1077558710366451. Epub 2010 May 6.Med Care Res Rev. 2010.PMID: 20448252No abstract available.
Cooper LA, Roter DL, Carson KA, Bone LR, Larson SM, Miller ER 3rd, Barr MS, Levine DM.Cooper LA, et al. Among authors: barr ms.J Gen Intern Med. 2011 Nov;26(11):1297-304. doi: 10.1007/s11606-011-1794-6. Epub 2011 Jul 6.J Gen Intern Med. 2011.PMID: 21732195Free PMC article.Clinical Trial.