1. Università Campus Biomedico. Dip. “Scienze e Tecnologie per l'Uomo e l'ambiente”. Via Alvaro del Portillo 21, Roma, Italy
2. Interdisciplinary Department of Medicine – Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases. School of Medicine, University of Bari, Piazza Giulio Cesare 11, Policlinico of Bari, Bari, Apulia, Italy
3. National Institute of Gastroenterology "Saverio de Bellis", Research Hospital, Castellana Grotte, Bari, Italy