1. Molecular and Genetic Epidemiology, Italian Institute for Genomic Medicine (IIGM), Torino, Italy
2. Department of Computer Sciences, University of Torino, Torino, Italy
3. Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
4. Institut d’Investigació Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
5. Division of Gastroenterology, Department of Medical Sciences, University of Torino, Torino, Italy
6. Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milano, Italy
7. Gastroenterology and Digestive Endoscopy Unit, “Città della Salute e della Scienza” Hospital, Torino, Italy
8. Gastroenterology, Hospital Mauriziano Umberto I, Torino, Italy
9. Pediatric Gastroenterology Unit, Department of Pediatrics, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di, Torino, Italy
10. School of Public Health, Imperial College London, London, UK