1. Faculty of Medicine; University of Liege
2. Department of Anatomopathology; Clinique CHR de la Citadelle; Liège Belgium
3. Department of Radiology; Clinique CHR de la Citadelle; Liège Belgium
4. Division of Pediatric surgery, Department of General Surgery; Clinique CHR de la Citadelle; Liège Belgium
5. Division of Pediatric Hematology-Oncology, Department of Pediatrics; La Citadelle Regional Hospital; Liège Belgium