[1] Univ Florence, Dept Surg & Translat Med, Florence, Italy
[2] Veneto Inst Oncol IRCCS, Familial Canc Clin, Padua, Italy
[3] Univ Pisa, Endocrinol Sect, Dept Clin & Expt Med, Pisa, Italy
[4] Univ Naples Federico II, Endocrinol Unit, Dept Clin Med & Surg, Naples, Italy
[5] Univ Verona, Endocrinol Sect, Dept Med, Internal Med, Verona, Italy
[6] Univ Sassari, Dept Clin & Expt Med, NET Unit, Sassari, Italy
[7] Azienda Osped Perugia, Umbria Reg Canc Network, Multidisciplinar NET Ctr, Perugia, Italy
[8] Univ Perugia, Perugia, Italy
[9] Univ Genoa, Policlin San Martino, Dept Internal Med & Med Specialties DiMI, Endocrinol Unit, Genoa, Italy
[10] Hosp Niguarda Ca Granda, Dept Endocrinol, Milan, Italy
[11] Univ Padua, Div Endocrinol, Dept Med DIMED, Padua, Italy
[12] Univ Milan, Milan, Italy
[13] Univ Milan, Dept Clin Sci & Community Hlth, Milan, Italy
[14] IRCCS Ist Auxol Italiano, Div Endocrine & Metab Dis, Milan, Italy
[15] Casa Sollievo della Sofferenza Hosp, IRCCS, Unit Endocrinol, Foggia, Italy
[16] S Orsola Malpighi Univ Hosp, Dept Med & Surg Sci, Bologna, Italy