A compound attribute that is the ratio of amount of elongin-A (human) in blood to amount of mitotic spindle assembly checkpoint protein MAD1 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055684 (ELOA/MAD1L1 protein level ratio in blood). Also known as: the ratio of amount of elongin-A (human) in blood to amount of mitotic spindle assembly checkpoint protein MAD1 (human) in blood.