Scuola Medica Salernitana - Centre for Celiac Disease, Universidad del Salvador (Buenos Aires, Argentina), University of Nottingham - Royal Derby Hospital, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Verona, First Department of Internal Medicine, Università degli Studi di Pavia, Tel Aviv University, Carol Davila University of Medicine and Pharmacy, All India Institute of Medical Sciences (AIIMS), affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Sheffield Teaching Hospitals NHS Foundation Trust, affiliation not provided to SSRN, University of Brescia, affiliation not provided to SSRN, University of Padua - Padua General University Hospital and Independent