1. Gastrointestinal Endoscopy Laboratory, WAM University Hospital, Medical University of Lodz, Lodz, Poland and Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, Lodz, Poland
2. Department of Endocrinology and Metabolic Diseases, Polish Mothers’ Memorial Hospital-Research Institute, Lodz, Poland
3. Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, Lodz, Poland