Funding for this research was provided by:
Department of Science and Technology of Sichuan Province (No. 2018sz0236)
Article History
Received: 28 January 2019
Accepted: 25 November 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: The protocol was approved by approval by the China Ethics Committee of Registering Clinical Trials (ChiECRCT-20180113). Address: West China Hospital, Sichuan University, NO. 37, Guo Xue Xiang, Chengdu, Sichuan, China. The study was registered with the Chinese Clinical Trial Registry (registration number: ChiCTR1800017273) on July 20, 2018. Website:ExternalRef removed. Written informed consent was obtained from the parents or legal guardians of all participants in the trial.
: The authors have no conflicts of interest.