1. Department of Public Health and PediatricsUniversity of Torino Torino Italy
2. Institute for Maternal Child Health IRCCS “Burlo Garofolo” Trieste Italy
3. Department of HaematologyBambino Gesù Hospital Rome Italy
4. Department of Woman and Child Health, Center for Rare Diseases and Birth Defects, Institute of PediatricsFondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome Italy