Funding for this research was provided by:
Startup Fund for scientific research, Fujian Medical University (2018QH1008)
Fujian Medical University's Research Foundation for Talented Scholars (XRCZX2018011)
Received: 8 October 2019
Accepted: 13 May 2020
First Online: 20 July 2020
Ethics approval and consent to participate
: We only collected the total number of outpatient visits that was not contain any individual or patient data. Ethics approval and consent to participate were unnecessary for the present study in accordance with the IRB of Fuzhou Center for Disease Control and Prevention.
: Not applicable.
: All authors declare that they have no competing interests.