A compound attribute that is the ratio of amount of death domain-containing protein CRADD (human) in blood to amount of peptidyl-prolyl cis-trans isomerase FKBP4 (human) in blood. The trait is CRADD/FKBP4 protein level ratio in blood (OBA_2054517). Also known as: the ratio of amount of death domain-containing protein CRADD (human) in blood to amount of peptidyl-prolyl cis-trans isomerase FKBP4 (human) in blood.