ESAM/SCARF1 protein level ratio in blood (OBA_2054759, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of endothelial cell-selective adhesion molecule (human) in blood to amount of scavenger receptor class F member 1 (human) in blood. Also known as: the ratio of amount of endothelial cell-selective adhesion molecule (human) in blood to amount of scavenger receptor class F member 1 (human) in blood.