Study	Reason for exclusion
AIRSAC Trial 2009	Investigated azathioprine versus sirolimus, not antibodies
Barlow 2001	OKT3 and rabbit ATG were given at random based on the availability of rabbit ATG
Borro 2005	Comparative study, not randomised
Garrity 2001	Retrospective study, not randomised
Geldmacher 2001	Not randomised
Jaksch 2011	Differences in concomitant immunosuppressive agents between the study groups
Lawrence 1989	Investigated association between interleukin‐2 levels and risk for rejection and infection; no intervention groups and not randomised
Lischke 2007	Comparative study, not randomised
Marom 2001	Retrospective study, not randomised
Meiser 1997	Not randomised
van Loenhout 2010	Not randomised, but compared with historical control group

ATG ‐ antithymocyte globulin