1. Consorzio Interuniversitario Risonanze Magnetiche di Metallo Proteine (C.I.R.M.M.P.), Sesto Fiorentino, 50019 Italy
2. Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, 50139 Italy
3. Department of Experimental and Clinical Medicine, University of Florence, Florence, 50139 Italy
4. Magnetic Resonance Center (CERM), University of Florence, Sesto Fiorentino, 50019 Italy
5. Tuscany Referral Center for Adult Coeliac Disease, Florence, 50139Italy
6. Department of Chemistry, University of Florence, Sesto Fiorentino, 50019 Italy