A compound attribute that is the ratio of amount of iduronate 2-sulfatase (human) in blood to amount of cyclic GMP-AMP phosphodiesterase SMPDL3A (human) in blood. The trait is IDS/SMPDL3A protein level ratio in blood (Ontology of Biological Attributes term OBA_2054346). Also known as: the ratio of amount of iduronate 2-sulfatase (human) in blood to amount of cyclic GMP-AMP phosphodiesterase SMPDL3A (human) in blood.