1. Functional Gastrointestinal Disorders Research Group, National Institute of Gastroenterology IRCCS “S. de Bellis”, 70013 Metropolitan, Italy
2. Section of Gastroenterology, Department of Precision and Regenerative Medicine and Ionian Area, University of Bari, 70124 Bari, Italy
3. Scientific Direction, National Institute of Gastroenterology IRCCS “S. de Bellis”, 70013 Metropolitan, Italy