Funding for this research was provided by:
Sanming Project of Medicine in Shenzhen (SZSM201612079)
This research was funded by the Shenzhen Science and Technology Innovation Committee (JCYJ20160429185235132)
Text and Data Mining valid from 2020-04-03
Received: 8 August 2019
Accepted: 13 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: The Ethics Committee at the Shenzhen Kangning Hospital approved this study. Table InternalRef removed displays the demographic characteristics of the participants. All participants and their parent or legal guardian provided verbal informed consent and this practice was approved by The Ethics Committee of Shenzhen Kangning Hospital.
: Not applicable.
: The authors declare that they have no competing interests.