1 Department of Pediatrics, Santo Spirito Hospital, Azienda Sanitaria Locale, Pescara, Italy, School of Pediatrics, University G. D'Annunzio, Chieti, Italy.
2 Department of Pediatrics, Santo Spirito Hospital, Azienda Sanitaria Locale, Pescara, Italy.
3 Department of Radiology, Santo Spirito Hospital, Azienda Sanitaria Locale, Pescara, Italy.