1. Clinical Department of Internal Medicine and Gastroenterology with Inflammatory Bowel Disease Unit, National Medical Institute of the Ministry of the Inferior and Administration, 02-507 Warsaw, Poland
2. Department of Internal Medicine, Endocrinology and Diabetology, National Medical Institute of the Ministry of the Inferior and Administration, 02-507 Warsaw, Poland
3. Mossakowski Medical Research Institute, Polish Academy of Science, 02-106 Warsaw, Poland
4. Collegium Medicum, Jan Kochanowski University, 25-317 Kielce, Poland