Funding for this research was provided by:
National Natural Science Foundation of China (81771623, 81670285)
Received: 25 August 2019
Accepted: 22 April 2020
First Online: 7 May 2020
Ethics approval and consent to participate
: This study was approved by the Medical Ethics Committee of Shanghai Children’s Medical Center and Xinhua Hospital. All parents were informed of the purpose and significance of the experiment and signed an informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.