[1] Univ Hosp Agostino Gemelli, Endocrinol & Diabetol Unit, Rome, Italy
[2] Univ Copenhagen, Dept Biomed Sci, Copenhagen, Denmark
[3] Natl Res Council Italy, Padua, Italy
[4] Univ Copenhagen, Novo Nordisk Fdn Ctr Basic Metab Res, Copenhagen, Denmark
[5] Univ Hosp Agostino Gemelli, Pancreat Unit, Ctr Digest Dis, Rome, Italy