Funding for this research was provided by:
National Key R&D Program of China (2017YFC1308100)
Central Public Welfare Scientific Research Fund of China (2016-F01)
Received: 2 January 2020
Accepted: 29 July 2020
First Online: 6 August 2020
Ethics approval and consent to participate
: Ethical Committee of Fuwai Cardiovascular Hospital approved the protocol (Approval NO. 2015–682), and written informed consent was obtained from all participants’ parents.
: Not applicable.
: The authors declare no competing interests.