1. Department of Gynaecology and Obstetrics, Faculty of Health Sciences, Odense University Hospital, Clinical Institute, University of Southern Denmark, Odense, Denmark;
2. Department of Obstetrics and Gynaecology, Karolinska University Hospital, Sweden and Clinical Institute, University of Southern Denmark, Odense, Denmark;
3. The National Research Center of Cancer Rehabilitation, Research Unit of General Practice, University of Southern Denmark, Odense, Denmark;
4. The Research Unit of Clinical Epidemiology, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark