The Pitfalls of Calcitonin as a Tumor Marker: Real-Life Data of Patients with Elevated Basal Calcitonin Levels but Without Evidence of Medullary Thyroid Carcinoma. - Lederer, Ann-Kathrin; Kessler, Constantin-Leonard Jacob; Bouzakri, Nabila; Lozan, Oana; Wild, Florian; Rauschkolb-Olk, Katharina Theresa; Rossmann, Heidi; Lang, Hauke; Musholt, Thomas J. (Journal of Clinical Medicine, 2026)