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O'Farrell N, Quigley M, Fox P.O'Farrell N, et al.Int J STD AIDS. 2005 Aug;16(8):556-9. doi: 10.1258/0956462054679151.Int J STD AIDS. 2005.PMID: 16105191
Mir N, O'Farrell N, Creagh TA, Knowles C.Mir N, et al.Int J STD AIDS. 1997 Jan;8(1):61-2. doi: 10.1258/0956462971918643.Int J STD AIDS. 1997.PMID: 9043986No abstract available.
White J, O'Farrell N, Daniels D; British Association for Sexual Health and HIV.White J, et al.Int J STD AIDS. 2013 Aug;24(8):593-601. doi: 10.1177/0956462413482811. Epub 2013 Jul 25.Int J STD AIDS. 2013.PMID: 23970591No abstract available.