Funding for this research was provided by:
Young Scientists Fund (No.81701351)
Text and Data Mining valid from 2020-02-13
Received: 18 September 2019
Accepted: 4 February 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: The study obtained the informed consent of the participant’s guardian, was approved by the Ethics Committee of Children’s Hospital of Fudan University (No. 2015–169), and complied with the Helsinki Declaration.
: All authors agree to publish this manuscript.
: The authors declare that they have no competing interests.