Funding for this research was provided by:
National Natural Science Foundation of China (61731008, 61871428)
Natural Science Foundation of Zhejiang Province (LJ19H180001)
King Abdullah University of Science and Technology (URF/1/3450-01)
Text and Data Mining valid from 2019-10-17
Received: 26 November 2018
Accepted: 13 September 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: The study was compliant with the Health Insurance Portability and Accountability Act protocols and was approved by the institutional review board at Hangzhou Dianzi University.
: Not applicable.
: The authors declare that they have no competing interests.