VEGFA and tuberculosis: Another limitation of the study was that we could not do within-group meta-analyses to compare VEGF levels between the TB subgroups, e.g., pulmonary vs. extrapulmonary TB, TB with cavitation vs. TB without cavitation, TB with RPT vs. TB without RPT, smear-positive TB vs. smear-negative TB, and HIV-infected TB vs. HIV-uninfected TV, since the number of observations was small.