1. Research Center for Prevention and Health; Capital Region of Denmark; Glostrup University Hospital; Glostrup Denmark
2. Department of Gynecology and Obstetrics; Juliane Marie Center; Rigshospitalet University Hospital; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
3. Department of Epidemiology; Lazio Regional Health Service Rome; Rome Italy
4. Department of Social Medicine; Institute of Public Health; University of Copenhagen; Copenhagen Denmark