Funding for this research was provided by:
Shanghai Municipal Health Bureau (CNKW2016Y07)
Received: 19 August 2020
Accepted: 11 February 2021
First Online: 1 May 2021
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Tongren Hospital Affiliated to Shanghai JiaoTong University, School of Medicine (No.: TR2019.050.01).
: Written informed consent for publication was obtained from all legal guardians prior to blood collection.
: The authors declare that they have no competing interests.