1. National and Kapodistrian University of Athens, Third Department of Paediatrics, Attikon General University Hospital, Athens, Greece
2. Department of Radiology Medical School, University of Ioannina, Ioannina, Greece
3. School of Medicine, National and Kapodistrian University of Athens, 2nd Department of Radiology, General University Hospital Attikon, Athens, Greece
4. Department of Paediatric Radiology, Robert Debré University Hospital, AP-HP, Paris, France
5. Iaso Maternity Hospital, Athens, Greece