1. Department of Neurology, National Neuroscience Institute, Singapore
2. Ho Neurology Pte Ltd, Gleneagles Medical Centre, Singapore
3. Department of Pharmacy, Singapore General Hospital, Singapore
4. Division of Neurology, Department of Medicine, National University Hospital, Singapore
5. Yong Loo Lin School of Medicine, National University of Singapore, Singapore
6. National University Polyclinics, National University Health System, Singapore
7. The Pain Specialist, Mount Elizabeth Hospital and Mount Elizabeth Novena Hospital, Singapore
8. Primary Care Network, National University Health System, Singapore
9. Department of Pharmacy, National University Hospital, Singapore