Funding for this research was provided by:
National Natural Science Foundation of China (71532014)
Text and Data Mining valid from 2019-12-01
Received: 14 February 2019
Accepted: 25 November 2019
First Online: 10 December 2019
Ethics approval and consent to participate
: In China national stroke screening and intervention program, China Stroke Data Center is authorized by Ministry of Health of China for collecting, analyzing and sharing data of the national stroke screening program for scientific research, the informed consent of human participants was obtained in written format, and it was approved by the Ethics Committee of Xuanwu Hospital, Capital Medical University.
: Not applicable.
: The authors declare that they have no competing interests.