“…Twenty-nine studies compared the psychosocial functioning of donors to nondonor controls from diverse sources, including the general population, medical outpatients, potential donors, healthy individuals, or family members of the recipient (32,36,(38)(39)(40)42,45,47,48,51,54,55,57,(59)(60)(61)(63)(64)(65)(66)(67)69,(71)(72)(73)(74)(75)78,79). Demographics or other relevant descriptors were provided for the control group in four studies (36,38,40,64).…”