A compound attribute that is the ratio of amount of C-C motif chemokine 15 (human) in blood to amount of C-C motif chemokine 23 (human) in blood. The trait is CCL15/CCL23 protein level ratio in blood (OBA_2054691). Also known as: the ratio of amount of C-C motif chemokine 15 (human) in blood to amount of C-C motif chemokine 23 (human) in blood.