1. Department of Internal Medicine and Therapeutics, University of Pavia, 27100 Pavia, Italy
2. First Department of Internal Medicine, Fondazione IRCCS San Matteo, 27100 Pavia, Italy
3. Laboratory of Dietetics and Clinical Nutrition, Department of Public Health, Experiemental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
4. Clinical Nutrition Unit, Department of General Medicine, Istituti Scientifici Maugeri IRCCS, 27100 Pavia, Italy