Funding for this research was provided by:
Ministry of Science and Technology of the People's Republic of China (2016YFC0904400)
Received: 18 June 2019
Accepted: 6 March 2020
First Online: 24 March 2020
Ethics approval and consent to participate
: The local ethics committee of Children’s Hospital of Fudan University approved the study protocol, and parents gave written informed consent for study participation.
: All authors agree to publish the study.
: The authors declare that they have no competing interests.