Funding for this research was provided by:
national natural science foundation of china (82070459, 81800583, 81571213)
national key research and development program of china (2017YFA0104304)
nanjing medical science and technique development foundation (YKK20071, QRX17006, QRX17057, ZKX20016)
nanjing department of health (201803024)
Received: 22 July 2021
Accepted: 22 September 2021
First Online: 9 October 2021
: All umbilical cord samples were taken after informed and written consent, and the study was approved by the Research Ethics Board of Nanjing Drum Tower Hospital (Permit Number: 2017–161-01). The animal experiments performed were approved by the Institutional Animal Care and Use Committee of Nanjing University.
: Not applicable.
: The authors declare that they have no competing interests.