Funding for this research was provided by:
National Natural Science Foundation of China (81771629, 81600399)
Science and Technology Project of Guangzhou (No.201707010014)
Received: 10 April 2018
Accepted: 28 June 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: The study was approved by the institutional review board of Guangzhou Women and Children’s Medical Center affiliated to Guangzhou Medical University, with the reference number:2016042036. All the guardians of the individuals involved this study gave informed consent for research publication.
: Not applicable.
: The authors declare that they have no conflict of interest.
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