1. Oxford Centre for Neuroinflammation, Nuffield Department of Clinical Neurosciences, Division of Clinical Neurology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK.
2. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK.
3. Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK.
4. Department of Clinical Medicine, Aarhus University Hospital, 8200 Aarhus N, Denmark.
5. Oxford Centre for Diabetes, Endocrinology, and Metabolism, University of Oxford, Oxford OX3 7LE, UK.
6. National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals Trust, Churchill Hospital, Oxford OX3 7LE, UK.
7. Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0QQ, UK.
8. Structural Biology and Biochemical Pharmacology, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
9. University of Oxford, Richard Doll Building, Roosevelt Drive, Oxford OX3 7DG, UK.