SLC11A1 and tuberculosis: Besides, the relationship between the NRAMP1 polymorphism exon 3–274 C/T, intron 4 G/C, exon 4 C125R, and 3' UTR delTGTG with TB cases could not be determined in this study due to the minimal genotype variation of exon 3–274 C/T, intron 4 G/C, and exon 4 C125R, and no 3' UTR mutations were found in the samples of this study.