title: Reply to letter to the editor.
authors.affiliation: Neonatal Surgery Section, Pediatric Surgery Department, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain. Electronic address: joprat@hsjbcn.org.
authors.forename: Jordi
authors.initials: J
authors.lastname: Prat Ortells
authors.affiliation: Pediatric Surgery Department, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain. Electronic address: ideharo@hsjbcn.org.
authors.forename: Irene
authors.initials: I
authors.lastname: de Haro Jorge