1. Department of Systems Medicine, Gastroenterology and Endoscopy Unit, University of Rome Tor Vergata, Rome, Italy
2. Department of Endoscopy and Hepatogastroenterology, Pavillon L, Edouard Herriot Hospital, Lyon, France
3. Department of Endoscopy and Hepatogastroenterology, Clermont-Ferrand University Hospital, Université Clermont Auvergne, Clermont-Ferrand, France
4. Department of Gynecology, Clermont-Ferrand University Hospital, Université Clermont Auvergne, Clermont-Ferrand, France