Hidden selection bias deriving from donor organ characteristics does not affect performance evaluations of kidney transplant centers.
Schold JD, Srinivas TR, Poggio ED, Stephany BR, Flechner SM, Goldfarb DA, Kattan MW. Hidden selection bias deriving from donor organ characteristics does not affect performance evaluations of kidney transplant centers. Med Care. 2010 Oct; 48(10):907-14.