1Institute of Neuroscience and Physiology, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
2Department of Neurosurgery, Sahlgrenska University Hospital, Gothenburg, Sweden
3Department of Neurosurgery, St.Olavs University Hospital HF, Trondheim, Norway
4Institute of Neuroscience, Norwegian University of Science and Technology, Trondheim, Norway
5Department of Neurosurgery, Uppsala University Hospital, Uppsala, Sweden
6Department of Clinical Neuroscience and Department of Medicine, Karolinska Institutet, Stockholm, Sweden
7Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden
8Department of Neurosurgery, Rigshospitalet, Copenhagen, Denmark
9Department of Radiation Sciences & Oncology University of Umeå Umea Sweden
10Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway