A compound attribute that is the ratio of amount of SLAM family member 5 (human) in blood to amount of platelet glycoprotein Ib alpha chain (human) in blood. The trait is OBA_2053384 (CD84/GP1BA protein level ratio in blood). Also known as: the ratio of amount of SLAM family member 5 (human) in blood to amount of platelet glycoprotein Ib alpha chain (human) in blood.