1 Department of Neonatology, Hospital Clínic Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine, Barcelona, Spain; Department of Neonatology, Hospital Sant Joan de Déu, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine, Barcelona, Spain.
2 Department of Neonatology, Hospital Clínic Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine, Barcelona, Spain; Department of Neonatology, Hospital Sant Joan de Déu, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine, Barcelona, Spain. Electronic address: mmalsina@clinic.cat.
3 Department of Pediatric Surgery, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain.
4 Department of Neonatology, Hospital Sant Joan de Déu, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine, Barcelona, Spain.
5 Department of Neonatology, Hospital Clínic Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine, Barcelona, Spain.