Funding for this research was provided by:
The Natural Science Foundation of China (81641007)
Article History
Received: 13 February 2018
Accepted: 12 August 2018
First Online: 16 August 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of our intistuion.This manuscript is not under simultaneous consideration by any other publication.Informed consent was obtained from the parent or guardian and assent obtained from the patient when appropriate.
: Informed consent was obtained from the parent or guardian and assent obtained from the patient when appropriate.
: The authors declare that they have no competing interest.
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