Funding for this research was provided by:
National Natural Science Foundation of China (81802142)
Science and Technology Project of Guangzhou (201704020132)
Received: 16 April 2019
Accepted: 26 June 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: Not applicable.
: As the patient is a minor, written informed consent was obtained from the patient’s next-of-kin.
: The authors declare that they have no competing interests.