EGF/GP6 protein level ratio in blood (OBA_2055602, an Ontology of Biological Attributes term) can be described as follows. A compound attribute that is the ratio of amount of pre-pro-epidermal growth factor (human) in blood to amount of platelet glycoprotein VI (human) in blood. Also known as: the ratio of amount of pre-pro-epidermal growth factor (human) in blood to amount of platelet glycoprotein VI (human) in blood.