A compound attribute that is the ratio of amount of pre-pro-epidermal growth factor (human) in blood to amount of tumor necrosis factor ligand superfamily member 14 (human) in blood. The trait is EGF/TNFSF14 protein level ratio in blood (Ontology of Biological Attributes id OBA_2055609). Also known as: the ratio of amount of pre-pro-epidermal growth factor (human) in blood to amount of tumor necrosis factor ligand superfamily member 14 (human) in blood.