1. Centre for Integrative Physiology University of Edinburgh Hugh Robson Building Edinburgh UK
2. Euan MacDonald Centre for Motor Neurone Disease Research University of Edinburgh Hugh Robson Building Edinburgh UK
3. Department of Molecular Biosciences Faculty of Agricultural and Life Sciences and Batten Animal Research NetworkLincoln UniversityChristchurch New Zealand
4. Department of Physiology, Development and Neuroscience University of Cambridge Downing Street Cambridge UK
5. Wolfson Brain Imaging Centre University of Cambridge Box 65 Addenbrooke's Hospital Hills Road Cambridge UK
6. Division of Neurobiology The Roslin Institute and Royal (Dick) School of Veterinary Studies University of Edinburgh Edinburgh UK