MTOR and bacterial urinary tract infection: There was no significant difference in the incidence of UTI when a mTOR-I was compared with MPA (7 studies, 2962 patients, RR = 1.00, 95 % CI 0.87–1.15, P = 0.96), with no significant heterogeneity (P = 0.32, I2 = 15 %) or publication bias (P = 0.94).