Funding for this research was provided by:
National Natural Science Foundation of China (71804009, 71603018, 91746116, 71972012, 71974011)
Ministry of Education of the People's Republic of China (16YJC630017)
Beijing Social Science Fund (17GLC043, 17JDGLB008)
Special Plan for Basic Research of Beijing Institute of Technology (20192142002)
Received: 21 February 2019
Accepted: 28 August 2019
First Online: 3 September 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all study participants. All procedures related to the study of human participants were approved by the Institutional Research Board of the First Affiliated Hospital of Xiamen University (No. KYX2016007).
: Not applicable.
: The authors declare that they have no competing interests.