1Department of Neurosurgery, Oslo University Hospital, Oslo, Norway
2Australian School of Advanced Medicine, Macquarie University, Sydney, Australia
3Unit of Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
4Department of Gynecological Cancer, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
5Department of Obstetrics and Gynaecology, Akershus University Hospital, Lørenskog, Norway
6The Cancer Registry of Norway, Oslo, Norway
7Department of Public Health, Norwegian University of Science and Technology, Trondheim, Norway
8Faculty of Medicine, University of Oslo, Oslo, Norway
9FORMI and Department of Neurology, Oslo University Hospital, Oslo, Norway