1. Neonatology Division; Hospital Materno Infantil; Hospital General Universitario Gregorio Marañón; Universidad Complutense; Madrid Spain
2. Cardiology Division; Hospital Materno Infantil; Hospital General Universitario Gregorio Marañón; Universidad Complutense; Madrid Spain
3. Social Pediatric Division; Hospital Infantil Universitario Niño Jesús; Madrid Spain