Funding for this research was provided by:
National Natural Science Foundation of China (81971993, 81902117)
Shanghai Sailing Program (19YF1431300)
Research Project of Shanghai Municipal Health Commission (20194Y0318)
Received: 2 March 2020
Accepted: 29 June 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: The Ruijin Hospital Ethics Committee approved the study protocol and received verbal informed consent because patients involved in the study, the data, and stool sample collection were all anonymized. All participants provided verbal consent prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.