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Ohlsson A, Wang E.Ohlsson A, et al.Am J Obstet Gynecol. 1990 Mar;162(3):809-18. doi: 10.1016/0002-9378(90)91016-6.Am J Obstet Gynecol. 1990.PMID: 2180308Review.
Gafni A, Goeree R, Myhr TL, Hannah ME, Blackhouse G, Willan AR, Weston JA, Wang EE, Hodnett ED, Hewson SA, Farine D, Ohlsson A.Gafni A, et al. Among authors: wang ee.CMAJ. 1997 Dec 1;157(11):1519-25.CMAJ. 1997.PMID: 9400406Free PMC article.Clinical Trial.
Ohlsson A, Wang E, Vearncombe M.Ohlsson A, et al.Clin Infect Dis. 1993 Aug;17 Suppl 1:S144-7. doi: 10.1093/clinids/17.supplement_1.s144.Clin Infect Dis. 1993.PMID: 8399905Review.