1 Chulalongkorn Centre of Excellence for Parkinson's Disease and Related Disorders, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.
2 The Academy of Science, The Royal Society of Thailand, Bangkok, Thailand.
3 Neurology Unit, Island Hospital, Georgetown, Penang, Malaysia.
4 National Institute of Mental Health and Neurosciences, Bengaluru, India.
5 Department of Neurology, Fujita Health University, Aichi, Toyoake, Japan.
6 Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
7 Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan, China.