1. Population Health Unit, “Salus in Apulia Study” National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Castellana Grotte, Italy;
2. Clinical Nutrition Unit, Medical Oncology, Department of Biomedical Science and Human Oncology, School of Medicine, University of Bari, Bari, Italy;
3. Laboratory of Epidemiology and Biostatistics, National Institute of Gastroenterology, “S. de Bellis”, Research Hospital, Castellana Grotte, Italy