Survey finds transplant centers consider "intellectual capacity" in assessing potential organ transplants.
Date: 1992
"A 1992 survey of 411 transplant centers... finds that people with IQs between 50 and 70 are considered contraindicated" (Ne'eman et al. 2013) for transplants.
People with IQs at this level are not permitted to receive a heart transplant. In other words, a person's right to an organ transplant is seen, in part, as being impacted by their intellectual capacity.