A compound attribute that is the ratio of amount of C-C motif chemokine 17 (human) in blood to amount of C-C motif chemokine 22 (human) in blood. The trait is OBA_2054692 (CCL17/CCL22 protein level ratio in blood). Also known as: the ratio of amount of C-C motif chemokine 17 (human) in blood to amount of C-C motif chemokine 22 (human) in blood.