1. Department of Neurology, NYU Grossman School of Medicine, New York, New York, United States
2. Department of Neurosurgery, NYU Grossman School of Medicine, New York, New York, United States
3. Department of Psychiatry, NYU Grossman School of Medicine, New York, New York, United States
4. GW Pharma Ltd, London, United Kingdom
5. Discipline of Physiology, School of Medicine, Trinity College Dublin, Dublin, Ireland
6. Biosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
7. Department of Neurosurgery, Royal Victoria Hospital, Newcastle upon Tyne, United Kingdom