Funding for this research was provided by:
National Natural Science Foundation of China (81401132)
Sichuan Provincial Science and Technology Support Program (2019YFS0218)
Article History
Received: 7 April 2020
Accepted: 30 August 2020
First Online: 7 September 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Sichuan University’s Ethical and confidentiality committee. All procedures were conducted in accordance with the approved guidelines. All participants and their parents or guardians provided written informed consent in the study.
: Not applicable.
: The authors declare that they have no competing interests.