1. Sheila Sherlock Liver Centre; Royal Free Hospital and the UCL Institute of Liver and Digestive Health; London UK
2. Radcliffe Department of Medicine; University of Oxford; Oxford UK
3. Department of Clinical Sciences and Community Health - Laboratory of Medical Statistics, Biometry and Epidemiology "G.A. Maccacaro"; Università degli Studi di Milano; Milan Italy
4. Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico; Milan Italy