Challenge of evaluating a national HIV prevention programme: the case of loveLife, South Africa
Pettifor, Audrey E ; MacPhail, Catherine ; Bertozzi, Stefano ; Rees, Helen V
Sexually transmitted infections, 2007-08, Vol.83 (suppl 1), p.i70-i74 [Periódico revisado por pares]England: BMJ Publishing Group Ltd
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