A compound attribute that is the ratio of amount of oncostatin-M (human) in blood to amount of protein S100-A12 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055147 (OSM/S100A12 protein level ratio in blood). Also known as: the ratio of amount of oncostatin-M (human) in blood to amount of protein S100-A12 (human) in blood.