Yan, Xiangyu
Li, Yongjie
Su, Hexuan
Xing, Yi
Zhang, Bo
Lu, Zuhong
Jia, Zhongwei http://orcid.org/0000-0002-5362-7339
Funding for this research was provided by:
National Natural Science Foundation of China (91546203, 91846302)
Article History
Received: 28 May 2020
Accepted: 22 June 2020
First Online: 14 July 2020
Ethics approval and consent to participate
: Ethics approval for this study was obtained from the Peking University Institutional Review Board (IRB00001052–16016). All participants will provide electronic written consent prior to taking part in the study. Participants under the age of 18 are asked to register the app system and sign the consent accompanied by a guardian, and written consent is also obtained from the guardian.
: No applicable.
: None declared.