HSPG2/SMOC2 protein level ratio in blood (OBA_2052963, an Ontology of Biological Attributes identifier) can be described as follows. A compound attribute that is the ratio of amount of basement membrane-specific heparan sulfate proteoglycan core protein (human) in blood to amount of SPARC-related modular calcium-binding protein 2 (human) in blood. Also known as: the ratio of amount of basement membrane-specific heparan sulfate proteoglycan core protein (human) in blood to amount of SPARC-related modular calcium-binding protein 2 (human) in blood.