gel filtration and radioimmunoassay were used to determine the molecular size and immunochemical reactivity of parathyroid hormone present in gland extracts , in the general peripheral circulation , and in parathyroid effluent blood ( obtained by venous catheterization ) from patients with hyperparathyroidism , as well as from calves and from cattle .
C0030518
parathyroid
C0020502
hyperparathyroidism