A compound attribute that is the ratio of amount of C-X-C motif chemokine 10 (human) in blood to amount of C-X-C motif chemokine 9 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2055183 (CXCL10/CXCL9 protein level ratio in blood). Also known as: the ratio of amount of C-X-C motif chemokine 10 (human) in blood to amount of C-X-C motif chemokine 9 (human) in blood.