1. Department of Neurology Yonsei University College of Medicine Seoul South Korea
2. Department of Neurology Yongin Severance Hospital, Yonsei University Health System Yongin South Korea
3. Department of Neurology Dongtan Sacred Heart Hospital, Hallym University College of Medicine Hwaseong South Korea
4. Department of Neurology Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine Wonju South Korea
5. Biostatistics Collaboration Unit, Department of Biomedical Systems Informatics Yonsei University College of Medicine Seoul South Korea