1. Department of Anatomy and Cell BiologyUniversity of Bergen N-5009 Bergen Norway
2. SINTEF Unimed MR Center N-7465 Trondheim Norway
3. Department of Anesthesia and Medical ImagingThe Norwegian University of Science and Technology Trondheim Norway
4. Experimental Neuro‐OncologyDepartment of NeuropathologyInstitute of PsychiatryKing's College London SE5 8AF UK
5. Center for Neuroscience, Guys'King's and St. Thomas School of Biomedical SciencesKing's College London SE1 1UL UK
6. Department of Neurobiology and BehaviorState University of New YorkStony Brook New York 11794 USA