1. Department of Neurology, Ewha Womans University Mokdong Hospital, Ewha Womans University College of Medicine, Seoul, Korea.
2. Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Neurology, Ewha Womans University Seoul Hospital, Ewha Womans University College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea.
5. Ewha Institute of Convergence Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea.