1. Department of Endocrinology and Radioisotope Therapy, Nephrology and Dialysotherapy, Military Medical Institute, Warsaw, Poland.
2. Department of Internal Diseases, Nephrology and Dialysotherapy, Military Medical Institute, Warsaw, Poland.
3. Georgetown University School of Medicine, Washington, District of Columbia, USA.
4. Thyroid Cancer Research Unit, MedStar Health Research Institute, Washington, District of Columbia, USA.