1. Department of Nutrition & Dietetics; School of Health Science and Education; Harokopio University; Athens Greece
2. Second Department of Internal Medicine; Athens University Medical School; Hippokration Hospital of Athens; Athens Greece
3. Laboratory of Histology & Embryology; Medical School; National & Kapodistrian University of Athens; Athens Greece
4. Department of Gastroenterology; Athens University Medical School; Laiko Hospital of Athens; Athens Greece