1 Department of Neurology, National Neuroscience Institute, Singapore; Duke-NUS Medical School, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore. Electronic address: yeo.tianrong@singhealth.com.sg.
2 Department of Neurology, National Neuroscience Institute, Singapore.
3 Department of Neurology, National Neuroscience Institute, Singapore; Duke-NUS Medical School, Singapore.