1. NeuroRx Research, Montreal, QC, Canada
2. Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada/McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, Montreal, QC, Canada/Department of Biomedical Engineering, McGill University, Montreal, QC, Canada
3. NeuroRx Research, Montreal, QC, Canada/Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
4. Biogen, Cambridge, MA, USA