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Schneeberger A, Mercer CH, Gregson SA, Ferguson NM, Nyamukapa CA, Anderson RM, Johnson AM, Garnett GP.Schneeberger A, et al.Sex Transm Dis. 2004 Jun;31(6):380-7. doi: 10.1097/00007435-200406000-00012.Sex Transm Dis. 2004.PMID: 15167650