Funding for this research was provided by:
National Natural Science Foundation of China (31300811)
Shanghai Pujiang Program (2016PJD032)
Fundamental research program funding of 9th People’s Hospital affiliated to Shanghai Jiao Tong University School of Medicine (JYZZ058)
Clinical Research Program of 9th People's Hospital affiliated to Shanghai Jiao Tong university School of Medicine (JYLJ2018011)
Received: 22 May 2020
Accepted: 24 September 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: The procedures for collecting the umbilical cord tissues used in this study have all been approved by the Research Ethics Committee of Shanghai First Maternity and Infant Hospital.
: Not applicable
: The authors have no competing interests to declare.