1. Department of Gastroenterology with Endoscopic Units, Medical University, Jaczewski Street 8, 20-954 Lublin, Poland
2. Department of Forensic Medicine, Medical University, Ceramiczna Street 1, 20-150 Lublin, Poland
3. Department of Medical Chemistry, Medical University, Chodźki Street 4a, 20-093 Lublin, Poland