A compound attribute that is the ratio of amount of protein disulfide isomerase CRELD2 (human) in blood to amount of tumor necrosis factor ligand superfamily member 13B (human) in blood. The trait is CRELD2/TNFSF13B protein level ratio in blood (OBA_2054490). Also known as: the ratio of amount of protein disulfide isomerase CRELD2 (human) in blood to amount of tumor necrosis factor ligand superfamily member 13B (human) in blood.