[1] Univ Complutense Madrid, Hosp Gen Gregorio Maranon, Dept Pediat Surg, Madrid, Spain
[2] Univ Complutense Madrid, Hosp Gen Gregorio Maranon, Dept Pediat Endocrinol, Madrid, Spain
[3] Univ Complutense Madrid, Hosp Gen Gregorio Maranon, Dept Pediat Nutr, Madrid, Spain
[4] Univ Complutense Madrid, Hosp Gen Gregorio Maranon, Dept Pathol, Madrid, Spain