Funding for this research was provided by:
Natural Science Foundation of Tianjin City (17JCZDJC32500)
Received: 22 March 2018
Accepted: 17 July 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: I declare that the study was performed according to international, national and institutional standards regarding experimental research, clinical studies and biodiversity rights. The written informed consent was obtained from all participants of the study. All procedures of this research were approved by the Ethics Commission of Tianjin Medical University with an ethical report.
: Not applicable.
: The authors declare that they have no competing interests.