Funding for this research was provided by:
National Natural Science Foundation of China (31501017)
Hunan Health Commission Research Fund (B2019019)
Text and Data Mining valid from 2019-11-21
Received: 25 June 2019
Accepted: 11 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: The study protocol was approved by the Academic Committee of Hunan Children’s Hospital (Approval number: HCHLL58, Changsha City, Hunan Province, China). The four family members provided their written informed consent to participate in this study.
: Written informed consent for publication was obtained from the participants or their guardians.
: The authors declare that they have no competing interests.