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Sambamoorthi U, Akincigil A, McSpiritt E, Crystal S.Sambamoorthi U, et al. Among authors: crystal s.J Acquir Immune Defic Syndr. 2002 Aug 1;30(4):429-39. doi: 10.1097/00042560-200208010-00009.J Acquir Immune Defic Syndr. 2002.PMID: 12138350
Akincigil A, Bowblis JR, Levin C, Jan S, Patel M, Crystal S.Akincigil A, et al. Among authors: crystal s.J Gen Intern Med. 2008 Feb;23(2):115-21. doi: 10.1007/s11606-007-0351-9. Epub 2007 Oct 6.J Gen Intern Med. 2008.PMID: 17922172Free PMC article.
Levin CA, Wei W, Akincigil A, Lucas JA, Bilder S, Crystal S.Levin CA, et al. Among authors: crystal s.J Am Med Dir Assoc. 2007 Nov;8(9):585-94. doi: 10.1016/j.jamda.2007.07.010. Epub 2007 Oct 22.J Am Med Dir Assoc. 2007.PMID: 17998115Free PMC article.