1. Neuroimmunology Unit, Department of Clinical Neuroscience, Karolinska University Hospital, Stockholm, Sweden.
2. Section for Neurosurgery, Department of Clinical Neuroscience, Karolinska University Hospital, Stockholm, Sweden.
3. Stereology and Electron Microscopy Laboratory, Centre for Stochastic Geometry and Advanced Bioimaging, Aarhus University Hospital, Aarhus, Denmark.