[1] Villalba University General Hospital,Department of Neonatology
[2] Hospital Universitario Fundación Jiménez Díaz and Fundación Instituto de Investigación Sanitaria,Biostatistics and Epidemiology Unit
[3] Instituto de Investigación Sanitaria del Hospital Universitario La Paz – IdiPAZ (La Paz University Hospital – Universidad Autónoma de Madrid),Neonatology
[4] Escuela Universitaria Politécnica de La Almunia,Department of Paediatrics and Neonatology
[5] University of Zaragoza,Primary Care Pediatrician
[6] Sligo University Hospital,Technical Direction of Health Information System, Health Care Deputy Management
[7] Alpedrete Health Center,Department of Obstetrics and Gynecology
[8] Primary Care Assistance Management,Department of Paediatrics
[9] Villalba University General Hospital,Department of Obstetrics and Gynecology, Hospital Clínico San Carlos, and Instituto de Investigación Sanitaria San Carlos (IdISSC)
[10] Villalba University General Hospital,undefined
[11] Universidad Complutense,undefined