Funding for this research was provided by:
National Natural Science Foundation of China (81400502, 81470035, 81600864)
Received: 8 September 2019
Accepted: 15 November 2019
First Online: 3 December 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of State Key Laboratory of Oral Diseases, Sichuan University (Chengdu, China) (WCHSIRB-D-2013-128-R1). Written informed consent was obtained from the parents prior to the start of the study. This study was in accordance with the Ethical Guidelines of the Declaration of Helsinki (First revision, 1975). The authors confirm that all ongoing and related trials for these experiments are registered. All experiments were performed in accordance with relevant guidelines, and informed written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.