1 Pediatric Cardiology and Pediatric Intensive Care Unit, Complejo Asistencial Universitario de Leon and IBIOMED (Biomedicine Institute of Leon, University of Leon, Leon, Spain.
2 Neonatal Intensive Care Unit, Complejo Asistencial Universitario de Leon, Spain. [email protected].
3 Neonatal Intensive Care Unit, Complejo Asistencial Universitario de Leon, Spain.
4 Pediatric Intensive, Intermediate and Palliative Care section, Complejo Hospital ario Universitario de Santiago, Santiago de Compostela, Spain.