1. Division of Neonatology; BCNatal Hospital Sant Joan de Déu-Hospital Clínic; Esplugues de Llobregat (Barcelona) Spain
2. Maternal and Infant Health and Development Research Network SAMID (RD 12/0026/0002); Health Research Institute Carlos III; Spanish Ministry of Economy and Competitiveness; Barcelona Spain
3. Division of Neonatology; Hospital de la Vall d'Hebrón; Barcelona Spain
4. Division of Neonatology; Hospital General Universitario Gregorio Marañón; Madrid Spain
5. Health Research Institute Gregorio Marañón (IiSGM); CIBEREHD; Madrid Spain
6. Division of Neonatology; Hospital Puerta del Hierro; Majadahonda (Madrid) Spain
7. Division of Neonatology; Hospital Alvaro Cunqueiro; Beade (Pontevedra) Spain
8. Biomedical Research Institute University of Santiago de Compostela; La Coruña Spain
9. Division of Neonatology; Hospital Universitario y Politécnico La Fe; Valencia Spain
10. Department of Newborn Research; The Royal Women's Hospital; Melbourne Victoria Australia
11. Department of Obstetrics and Gynaecology; The University of Melbourne; Melbourne Victoria Australia
12. PIPER - Neonatal Retrieval Services; The Royal Children's Hospital; Melbourne Victoria Australia