International Headache Center, Chinese PLA General Hospital, Beijing, China;4. Department of Neurology, The First Affiliated Hospital of USTC, Anhui, China;5. Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Jilin, China;6. Department of Neurology, The First Affiliated Hospital of Soochow University, Jiangsu, China;7. Department of Neurology, Lishui Municipal Central Hospital, Zhejiang, China;8. Department of Neurology, Sir Run Shaw Hospital, Zhejiang, China;9. Department of Neurology, Xingtai People's Hospital, Hebei, China;10. Department of Neurology, Xiangya Hospital, Central South University, Hunan, China;11. Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Shandong, China;12. Department of Neurology, Qilu Hospital, Shandong, China;13. Department of Neurology, Changsha Central Hospital Affiliated to University of South China, Changsha, China;14. Department of Neurology, Affiliated Hospital of Jining Medical University, Shandong, China;15. Department of Neurology, The People's Hospital of Liaoning Province, Liaoning, China;16. Department of Neurology, Linyi Jinluo Hospital, Shandong, China;17. Department of Neurology, Zhengzhou University First Affiliated Hospital, Henan, China;18. Department of Neurology, The Second Hospital of Jilin University, Jilin, China;19. Department of Neurology, The First Affiliated Hospital of Xiamen University, Fujian, China;20. Department of Neurology, People's Hospital, Peking University, Beijing, China;21. Department of Neurology, Guangzhou First People's Hospital, Guangdong, China;22. Department of Neurology, Aerospace Center Hospital, Beijing, China;23. Department of Neurology, Dalian Municipal Central Hospital, Liaoning, China;24. Department of Neurology, Jiangsu Province Hospital, Jiangsu, China