1. From the Department of Neurology (J.Y., J.-H.B., H.P., D.S., K.K., I.G.H., Y.D.K., K.-Y.L., H.S.N., J.H.H.)
2. Yonsei University College of Medicine, Seoul, Korea; Department of Neurology, Keimyung University School of Medicine, Daegu, Korea (J.Y.)
3. Department of Neurology, National Medical Center, Seoul, Korea (J.-H.B.)
4. Department of Neurology, Yonsei Wonju University College of Medicine, Korea (S.H.K.)
5. Biostatistics Collaboration Unit (H.S.L.)
6. Department of Neurology, Chosun University College of Medicine, Kwangju, Korea (S.H.A.)
7. Department of Neurology, Pusan National University School of Medicine, Busan, Korea (H.-J.C.)
8. Department of Neurology, National Health Insurance Service Ilsan Hospital, Goyang, Korea (G.S.K.)
9. Department of Neurology, CHA Bundang Medical Center, CHA University, Seongnam, Korea (J.K.)
10. Department of Neurology, Ewha Womans University College of Medicine, Seoul, Korea (T.-J.S.)
11. Department of Neurology, Kyung Hee University School of Medicine, Seoul, Korea (H.-Y.C.).