Wu, Yang
Hua, Xintian
Yang, Gang
Xiang, Bo
Jiang, Xiaoping
Article History
Received: 22 September 2019
Revised: 27 February 2020
Accepted: 5 March 2020
First Online: 30 March 2020
Compliance with ethical standards
: The ethics committee of West China Hospital of Sichuan University approved the study and informed parental consent was obtained.
: The authors declare that they have no conflict of interest.