[1] Univ Pavia, Dept Internal Med, Pediat & Adolescent Unit, I-27100 Pavia, Italy
[2] Buzzi Childrens Hosp, Pediat Dept, I-20154 Milan, Italy
[3] Univ Pavia, Dept Publ Hlth Expt & Forens Med, Lab Dietet & Clin Nutr, I-27100 Pavia, Italy
[4] Ist Clin Sci Maugeri IRCCS, Clin Nutr & Dietet Serv, Unit Internal Med & Endocrinol, I-27100 Pavia, Italy
[5] V Buzzi Childrens Hosp, Pediat Cardiol Unit, I-20154 Milan, Italy
[6] Univ Milan, Dept Biomed & Clin Sci L Sacco, I-20157 Milan, Italy