1 Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy.
2 Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy.
3 Department of Medical Sciences and Public Health, University of Cagliari and Gastroenterology Unit, University Hospital of Cagliari, Cagliari, Italy.
4 Gastroenterology Unit, University Hospital of Cagliari, Cagliari, Italy.
5 Consiglio Nazionale delle Ricerche (C.N.R.), Istituto di Ricerca Genetica e Biomedica (I.R.G.B.), Monserrato, Cagliari, Italy.
6 Department of Biochemistry, University of Cambridge, Cambridge, UK.
7 Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy. [email protected].