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The following reference was omitted from this paper:
10. Wand H, Ramjee G. Combined impact of sexual risk behaviors for HIV seroconversion among women in Durban, South Africa: implications for prevention policy and planning. AIDS Behav 2011;15:479–86.
References in the manuscript should be re-numbered accordingly.
‘Introduction’ section, page 2, paragraph 1, lines 8-12 should have read: “In this paper, we use the population attributable risk (PAR), which takes account of both …