1. Paediatric Department; Kolding Hospital; Kolding Denmark
2. Paediatric Department; Rigshospitalet; Copenhagen Denmark
3. Paediatric Department; Hvidovre Hospital; Hvidovre Denmark
4. Bandim Health Project; SSI; Copenhagen Denmark
5. CVIVA; Bandim Health Project; SSI & Section of Biostatistics, University of Copenhagen; Copenhagen Denmark
6. Department of Obstetrics and Gynaecology; Odense University Hospital; Odense Denmark
7. The Child and Adolescent Clinic; Rigshospitalet; Copenhagen Denmark
8. CVIVA; Bandim Health Project; SSI & OPEN, Institute of Clinical Research; University of Southern Denmark; Copenhagen Denmark
9. Odense University Hospital; Odense Denmark