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Clark TJ, Mann CH, Shah N, Khan KS, Song F, Gupta JK.Clark TJ, et al. Among authors: khan ks.Acta Obstet Gynecol Scand. 2001 Sep;80(9):784-93. doi: 10.1034/j.1600-0412.2001.080009784.x.Acta Obstet Gynecol Scand. 2001.PMID: 11531627Free article.Review.
Clark TJ, Khan KS, Gupta JK.Clark TJ, et al. Among authors: khan ks.BMC Med Res Methodol. 2001;1:12. doi: 10.1186/1471-2288-1-12. Epub 2001 Dec 17.BMC Med Res Methodol. 2001.PMID: 11782286Free PMC article.Clinical Trial.
Clark TJ, Mann CH, Shah N, Khan KS, Song F, Gupta JK.Clark TJ, et al. Among authors: khan ks.BJOG. 2002 Mar;109(3):313-21. doi: 10.1111/j.1471-0528.2002.01088.x.BJOG. 2002.PMID: 11950187Review.