Dipartimento di Medicina Interna e Gastroenterologia, Università di Bologna, Bologna, Italy Center for Applied Biomedi-cal Research, Università di Bologna, Bologna, Italy;
Center for Gastroenterology and Hepatology, Karolinska University Hospital Huddinge, Stockholm, Sweden;
Center for Metabolism and Endocrinology, Karolinska University Hospital Huddinge, Stockholm, Sweden;
Department of Laboratory Medicine, Division of Clinical Chemistry, Karolinska University Hospital Huddinge, Stockholm, Sweden;
Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157, United States;