1. Department of Obstetrics and Gynaecology; Aarhus University Hospital; Aarhus Denmark
2. Department of Clinical Medicine; Aarhus University; Aarhus Denmark
3. Section of Biostatistics; Department of Public Health; Aarhus University; Aarhus Denmark
4. Centers for Disease Control and Prevention (CDC); Atlanta GA USA
5. Division of Psychiatry; University of Stavanger; Stavanger Norway
6. Children's Neurocenter at Vejlefjord Rehabilitation Center; Stouby Denmark
7. Institute of Public Health and Center for Healthy Aging; University of Copenhagen; Copenhagen Denmark