Received: 6 March 2021
Accepted: 7 May 2021
First Online: 17 May 2021
: In this study, all methods were performed in accordance with the relevant guidelines and regulations. Our study had been approved by the ethics committee of our hospital (XC201811029a), and written informed consents had been obtained from the relatives or guardians of the included CHD children.
: Not applicable.
: The authors declare that they have no competing interests.