Hypercalcitoninemia in thyroid conditions other than medullary thyroid carcinoma: a comparative analysis of calcium and pentagastrin stimulation of serum calcitonin - Lorenz, K; Elwerr, M; Machens, A; Abuazab, M; Holzhausen, H J; Dralle, H (Langenbecks Arch Surg, 2013)