A compound attribute that is the ratio of amount of immunoglobulin superfamily member 8 (human) in blood to amount of V-type immunoglobulin domain-containing suppressor of T-cell activation (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054411 (IGSF8/VSIR protein level ratio in blood). Also known as: the ratio of amount of immunoglobulin superfamily member 8 (human) in blood to amount of V-type immunoglobulin domain-containing suppressor of T-cell activation (human) in blood.