M Luisa Lobo1, Michael Riccabona2, Lil-Sofie Ording Müller3. 1. Department of Radiology, Hospital de Santa Maria - CHLN, University Hospital, Lisbon, Portugal. mluisalobo@gmail.com. 2. Department of Radiology, Division of Pediatric Radiology, University Hospital LKH Graz, Graz, Austria. 3. Department of Radiology and Nuclear Medicine, Unit for Paediatric Radiology, Oslo University Hospital, Oslo, Norway.