Funding for this research was provided by:
National Natural Science Foundation of China (81770634)
Text and Data Mining valid from 2020-03-06
Received: 31 October 2019
Accepted: 17 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: All study participants provided verbal consent. The reason: Since the samples used in this study were faeces, Participants will not be harmed or lost. They are willing to provide samples and the ethics committee of the First Hospital affiliated to Harbin Medical University reviewed and approved all procedures (including verbal consent) for the experimental specimens. Institutional human subject study number: ExternalRef removed.
: Not applicable.
: The authors declare that they have no competing interests to disclose.