1. Gastroenterology UnitDepartment of Medical SciencesUniversity of FoggiaFoggiaItaly
2. Gastroenterology UnitIRCCS Saverio De BellisCastellana Grotte (Ba)Italy
3. Internal Medicine UnitUniversity of FoggiaItaly
4. Department of Internal MedicineAl‐Azhar UniversityCairoEgypt