Funding for this research was provided by:
Natural Science Foundation of Shanghai (17411965800)
Received: 18 June 2020
Accepted: 7 September 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine (XHEC-D-2020-014). Since the participants was children (< 14 years old), written informed consent from their parents to participate in the study had been obtained, and procedures were conducted according to the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.