1. Pier Antonio Battistella, Pietro Mattesi, Gian Luca Casara, Antonio Condini, Franco Rigon, Pediatric Department, University of Padova, Padova, Italy; Carla Carollo, Service of Neuroradiology, Hospital of Padova, Padova, Italy; Filippo Allegri, Department of Radiology, University of Padova, Padova, Italy;