Oluf Dimitri Røe1,2,3. 1. Norwegian University of Science and Technology, Faculty of Medicine and Health Sciences, 7030 Trondheim, Norway. 2. Department of Clinical Research and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway. 3. Department of Oncology, Levanger Hospital, Nord-Trøndelag Hospital Trust, N-7600 Levanger, Norway.