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;