1. Neuroimmunological Diseases Unit, Neuroimmunology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.
2. School of Medicine, Pusan National University, Yangsan 626870, South Korea.
3. Department of Neurology, Chinese PLA General Hospital, Beijing 100853, China.
4. Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA.