1. Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw, Poland.
2. Department of Biochemistry, Medical Centre for Postgraduate Medical Education, Warsaw, Poland.
3. Department of Hypertension and Diabetes, Medical University of Gdańsk, Gdańsk, Poland.
4. Department of General and Thoracic Surgery, Medical University of Warsaw, Warsaw, Poland.
5. Division of Endocrine Surgery, Institute of Oncology, Warsaw, Warsaw Poland.
6. Department of Pathology, Medical University of Warsaw, Warsaw, Poland.
7. Department of Endocrinology, Medical Research Centre, Polish Academy of Science, Warsaw, Poland.