Stratification analyses of combined effects of TGFB1 +869 T/C and +915 G/C polymorphisms on acute rejection risk.

Abbreviations: RTx, renal transplantation; LTx, liver transplantation; HTx, heart transplantation; CsA, cyclosporine A; FK506, tacrolimus; LP, low producer; IP, intermediate producer; HP, high producer.—, cannot be calculated;aNumber of eligible studies;bP value of Z-test for significance of OR;cP value of Q-test for heterogeneity test;dStatistically significant results (in bold).