Funding for this research was provided by:
National Natural Scientific Foundation of China (82074000, 81903784)
Natural Science Foundation of Hunan Province (2020JJ4878)
the Scientific Research Project of Department of Education of Hunan Province (20K136)
NHC Key Laboratory of Birth Defect for Research and Prevention (KF2020002)
Received: 6 May 2021
Accepted: 20 July 2021
First Online: 23 July 2021
: These procedures used for feces samples collection were approved by Ethics Committee of Central South University.
: All participates signed informed consent.
: The authors declare that they have no competing interests.