Funding for this research was provided by:
National Natural Science Foundation of China (30872967, 81602356, 81001194)
Received: 29 June 2020
Accepted: 3 September 2020
First Online: 15 September 2020
Ethics approval and consent to participate
: The study was granted ethical approval by the Ethical Committee of the First Affiliated Hospital of Sun Yat-Sen University, and all the patients or parents/guardians of patients under the age of 16 provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.