GSTM1 and tuberculosis: The reasons for exclusion were as follows: less common extrapulmonary TB forms, such as cutaneous (15), ocular (7), breast (9), epididymal (2), bone (3), and renal (1); blood transfusions in the last four months (2); Hb results not available from 10 days before to 10 days after starting TB treatment (18); and missing demographic, socioeconomic, or clinical data (13).