[1] Meyer Childrens Hosp, Neurooncol Unit, Florence, Italy
[2] Meyer Childrens Hosp, Paediat Neurol Labs, Florence, Italy
[3] Meyer Childrens Hosp, Med Genet Unit, Florence, Italy
[4] Ist Nazl Tumori, Dept Paediat, I-20133 Milan, Italy
[5] Meyer Childrens Hosp, Neurosurg Unit, Florence, Italy