1. Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea.
2. Stroke and Neurological Disorders Center, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea.
3. Department of Epidemiology and Biostatistics, Graduate School of Public Health and Institute of Health and Environment, Seoul University, Seoul, Republic of Korea.
4. Department of Neurology, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
5. Integrative Parkinson's Disease Research Group, Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul, Republic of Korea.