The MAFs of NR1I3, NR1I2, and CYP2B6 variant alleles in the study cohort (Ethiopian TB-HIV co-infected patients) and the HapMap reference populations of Caucasians, Asian and Yoruba origin obtained from the NCBI SNP database (dbSNP) are shown in Table 2. The gene discussed is CYP2B6; the disease is tuberculosis.