Funding for this research was provided by:
National Natural Science Foundation of China (81530086)
Received: 15 September 2019
Accepted: 28 July 2020
First Online: 3 August 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Xinhua Hospital, affiliated to Shanghai Jiao Tong University School of Medicine (XHEC-C-2018-082), and the procedures were carried out in accordance with the Helsinki Declaration. Written informed consent was obtained from all participants’ parents or guardians as appropriate.
: Not applicable.
: The authors declare that they have no competing interests.