Sensitivity analysis was performed by deleting one study at one time to assess the stability of the pooled ORs. None of the corresponding pooled ORs was statistically changed, implying the stability of the results. By using the healthy samples as controls, the comparison was carried out between the HIV-1 patients and healthy samples; (B) By using the HIV-1 exposed but seronegative (HESN) samples as controls, the comparison was carried out between the HIV-1 patients and the HIV-1 exposed but seronegative (HESN) samples. Note: A Bonferroni correction for multiple testing of 4 was applied to get a corrected P value in this primary analysis. The association between 5-repeat allele had a corrected P value of 0.05. doi:10.1371/journal.pone.0042972.g002