- Correspondence to Dr Nagaendran Kandiah, Neurology, National Neuroscience Institute, Singapore 308433, Singapore;
- Received February 26, 2020
- Revised April 19, 2020
- Accepted June 22, 2020
- First published July 30, 2020.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.