A compound attribute that is the ratio of amount of cathepsin Z (human) in blood to amount of cyclic GMP-AMP phosphodiesterase SMPDL3A (human) in blood. The trait is CTSZ/SMPDL3A protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054629). Also known as: the ratio of amount of cathepsin Z (human) in blood to amount of cyclic GMP-AMP phosphodiesterase SMPDL3A (human) in blood.