1. INAIL-DIPIA, Via Alessandria 220E, 00198 Rome, Italy
2. Surgery Unit, Institute of Child Health and Great Ormond Street Hospital, University College London, 30 Guilford Street, London WC1N 1EH, UK
3. University of Rome “Tor Vergata”, Department of Enterprise Engineering, Intrauniversitary Consortium for Material Science and Technology (INSTM), Research Unit “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy