Neuroscience Center, Bumrungrad International Hospital, Bangkok, Thailand. Siriraj Neuroimmunology Center, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. Department of Preventive and Social Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. Neuroscience Center, Bumrungrad International Hospital, Bangkok, Thailand. doctorkrit@gmail.com. Department of Preventive and Social Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. doctorkrit@gmail.com. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. doctorkrit@gmail.com.