Funding for this research was provided by:
National Key Research and Development Program of China (2017YFC1309605)
Nanjing Health Youth Talent (QRX17123)
Jiangsu Provincial Key Medical Discipline (ZDXKB2016012)
Received: 22 November 2020
Accepted: 25 May 2021
First Online: 10 June 2021
: The study was approved by the Ethics Committee of Nanjing Drum Tower Hospital (No. SC201600202). All participants and/or guardians provided written informed consent. The human newborn umbilical cord tissues used in this study were obtained from the Clinical Stem Cell Center in Nanjing Drum Tower Hospital which was also approved by the Ethics Committee.
: Consent for publication was obtained from every participant.
: The authors declare no competing interests.