CCDC80/CHRDL1 protein level ratio in blood (Ontology of Biological Attributes id OBA_2054805) can be described as follows. A compound attribute that is the ratio of amount of coiled-coil domain-containing protein 80 (human) in blood to amount of chordin-like protein 1 (human) in blood. Also known as: the ratio of amount of coiled-coil domain-containing protein 80 (human) in blood to amount of chordin-like protein 1 (human) in blood.