Funding for this research was provided by:
China National Funds for Distinguished Young Scientists (81571253)
Natural Science Foundation of Hunan Province (2016JJ3135)
Received: 27 December 2018
Accepted: 6 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: Written informed consent was obtained from parents and patients older than age 18 years for participation in this study, which was approved by the ethics committee of the state key laboratory of medical genetics, Central South University (approval number: 2013051201).
: Not applicable.
: The authors declare that they have no competing interests.
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