[1] Univ Pavia, Dept Internal Med, Pediat & Adolescent Unit, Pavia, Italy
[2] V Buzzi Childrens Hosp, Pediat Unit, I-20153 Milan, Italy
[3] Fond IRCCS Policlin S Matteo, Pediat Unit, I-27100 Pavia, Italy
[4] Univ Pavia, I-27100 Pavia, Italy
[5] Univ Pavia, Dept Publ Hlth Expt & Forens Med, Lab Dietet & Clin Nutr, I-27100 Pavia, Italy
[6] Univ Milan, L Sacco Dept Biomed & Clin Sci, I-20153 Milan, Italy
[7] V Buzzi Childrens Hosp, Pediat Surg Unit, I-20153 Milan, Italy
[8] IRCCS Ctr Neurolesi Bonino Pulejo, I-98124 Messina, Italy
[9] ICS Maugeri IRCCS, Unit Internal Med & Endocrinol, Clin Nutr & Dietet Serv, I-27100 Pavia, Italy