CCR5 and AIDS: We did not resequence CCR5 and CCR2 since these receptor genes had been previously sequenced in HIV patients [28], [43], nor did we resequence CX3CR1. We previously showed that CX3CR1-V249I and -T280M had no effect on AIDS progression in our group of seroconverter subjects [44], and therefore did not include them in this analysis.