1. UCL Institute for Liver and Digestive Health and Sheila Sherlock Liver UnitRoyal Free Hospital and University College LondonLondon UK
2. Department of Nuclear MedicineRoyal Free HospitalLondon UK
3. 4th Department of Internal Medicine, Hippokration General Hospital of ThessalonikiMedical School of Aristotle UniversityThessaloniki Greece
4. National Institute of Gastroenterology“S. de Bellis” Research HospitalCastellana Grotte Italy