1. Imperial College Medical Cannabis Research Group, Department of Surgery and Cancer, Imperial College London, London, United Kingdom.
2. Sapphire Medical Clinics, London, United Kingdom.
3. St. George's Hospital NHS Trust, London, United Kingdom.
4. Dartford and Gravesham NHS Trust, Kent, United Kingdom.
5. Dudley Group of Hospitals NHS Trust, West Midlands, United Kingdom.
6. Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom.
7. Buckinghamshire Healthcare NHS Trust, Amersham, United Kingdom.
8. Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, London, United Kingdom.
9. South London and Maudsley NHS Foundation Trust, London, United Kingdom.