1. Department of Pediatrics, University of Chieti-Pescara “G. D’Annunzio”, Via Dei Vestini 5, Ospedale Clinicizzato Chieti (CH), 66100 Chieti, Italy
2. Department of Radiology, Pescara Public Hospital “Santo Spirito”, 65124 Pescara, Italy
3. Department of Internist Ultrasound, Pescara Public Hospital “Santo Spirito”, 65124 Pescara, Italy