1 Department of Neurology, Singapore General Hospital Campus, National Neuroscience Institute, Singapore.
2 Department of Neurology, Singapore General Hospital Campus, National Neuroscience Institute, Singapore; Neuroscience and Behavioural Disorders, Duke-NUS Medical School, Singapore.
3 Neuroscience and Behavioural Disorders, Duke-NUS Medical School, Singapore; Department of Neuroradiology, Singapore General Hospital, Singapore.
4 Department of Neurology, Singapore General Hospital Campus, National Neuroscience Institute, Singapore; Neuroscience and Behavioural Disorders, Duke-NUS Medical School, Singapore. Electronic address: EKL2EKL2@gmail.com.