Köksal, Muammer Osman, et al. “Frequency of CCR5-Δ32, CCR2-64I and SDF1-3’A Alleles in HIV-Infected and Uninfected Patients in Istanbul, Turkey”. The Journal of Infection in Developing Countries, vol. 15, no. 08, Aug. 2021, pp. 1183-9, doi:10.3855/jidc.12861.