title: Reply.
authors.affiliation: Pediatric Hematology, Department of Pediatrics, University Hospital Città della Salute e della Scienza di Torino, Torino, Italy.
authors.forename: Paola
authors.initials: P
authors.lastname: Saracco
authors.affiliation: University Neonatology Unit, Department of Obstetrics and Gynecology, University Hospital Città della Salute e della Scienza di Torino, Torino, Italy.
authors.forename: Rossana
authors.initials: R
authors.lastname: Bagna