High frequency of rapid immunological progression in African infants infected in the era of perinatal HIV prophylaxis. - Mphatswe, W; Blanckenberg, N; Tudor-Williams, G; Prendergast, A; Thobakgale, C; Mkhwanazi, N; McCarthy, N; Walker, B; Kiepiela, P; Goulder, P (AIDS (London, England), 2007)