- Correspondence to Dr Choong Yi Fong, Division of Paediatric Neurology, Department of Paediatrics, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia;
- Received October 15, 2018
- Revised April 18, 2019
- Accepted April 23, 2019
- First published May 23, 2019.
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