1. DIVISION OF PATHOPHYSIOLOGY, DEPARTMENT OF PATHOPHYSIOLOGY AND ENDOCRINOLOGY, MEDICAL UNIVERSITY OF SILESIA, KATOWICE, POLAND
2. DEPARTMENT OF ENDOCRINOLOGY AND NEUROENDOCRINE TUMOURS, DEPARTMENT OF PATHOPHYSIOLOGY AND ENDOCRINOLOGY, MEDICAL UNIVERSITY OF SILESIA, KATOWICE, POLAND
3. DEPARTMENT OF PATHOLOGY, INSTITUTE OF MEDICAL SCIENCES, UNIVERSITY OF OPOLE, OPOLE, POLAND