Diagnosis of medullary carcinoma of the thyroid (mtc) using calcitonin (ct) policlonal radioimmunoassay: criteria for the normal values and pathological levels - Abelin, N M A; Fares, I; Dahia, P L M; Ezabella, M C L; Hayashida, C Y; Toledo, S. P. A. (Congreso Panamericano de Endocrinologia, 1994)