Funding for this research was provided by:
Ministry of Science and Technology of the People's Republic of China (2016YFC1300605)
Text and Data Mining valid from 2019-11-12
Received: 7 June 2019
Accepted: 29 October 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: This study and related protocols were approved by the Ethics Committee of Peking University First Hospital. Written informed consent was obtained from all the study participants and/or their parents. The study has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: The adult patients and the parents of the children described in this article provided consent for participation in the study and for publishing the obtained results.
: The authors declare that they have no competing interests.