Funding for this research was provided by:
Key technologies of prevention and control of diseases and infectious diseases in Suzhou City (Gwzx201506, Gwzx201605, Gwzx201706)
Pre-research foundation for nature science of Soochow University (Q313904713)
the Soochow University high-level scientific research foundation for the introduction talent (Q413900612)
the project-sponsored by SRF for ROCS, SEM (K513901814)
Received: 29 March 2018
Accepted: 11 September 2018
First Online: 19 September 2018
Ethics approval and consent to participate
: All of participants were asked to provide informed consent and the study protocol was approved by the ethics committees of Soochow University. The methods were carried out in accordance with the ethical guidelines of the 1975 Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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