Stratification analyses of combined effects of <i>TGFB1</i> +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).