Escape events.

aWhere the presenting Class I allele was serologically determined it has been converted to the equivalent 2-digit genotype using the 2004 HLA Dictionary [48]. Although this mapping is not in general one-to-one for all the cases where we used it the two digit genotype could be unequivocally determined.bHLA class I associated relative hazard of progression to AIDS-1987 for the Caucasian population with Class I homozygosity, CCR2 and CCR5 considered as confounding covariates [28].cGag 20–28 is presented by A*0301, Gag 24–31 is presented by B*0801. A*03 and B*08 have the same relative hazard. We have previously studied 19 of these escape events [30].