[1] Amedeo Avogadro Univ Novara, Dept Clin & Expt Med, Div Pediat, I-28100 Novara, Italy
[2] Univ Naples Federico II, Dept Endocrinol, I-80100 Naples, Italy
[3] Univ Turin, Div Endocrinol & Metab Dis, I-10100 Turin, Italy
[4] Regina Elena Inst Canc Res, Serv Endocrinol, I-00100 Rome, Italy
[5] Hosp Treviglio, Div Pediat Endocrinol, I-24047 Treviglio, Italy
[6] Univ Genoa, IRCCS G Gaslini, Dept Pediat, I-16100 Genoa, Italy
[7] Univ Parma, Div Pediat, I-8100 Parma, Italy
[8] Eli Lilly & Co, Florence, Italy
[9] Univ Naples Federico II, Dept Pediat, Naples, Italy