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Washington AE, Aral SO, Wølner-Hanssen P, Grimes DA, Holmes KK.Washington AE, et al. Among authors: aral so.JAMA. 1991 Nov 13;266(18):2581-6.JAMA. 1991.PMID: 1942404Review.
Padian N, Aral SO, Holmes KK.Padian N, et al. Among authors: aral so.Sex Transm Dis. 1994 Mar-Apr;21(2 Suppl):S53-4.Sex Transm Dis. 1994.PMID: 8042117Review.