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Article History

Received: 2 September 2019

Accepted: 3 October 2019

First Online: 6 November 2019

Ethics approval and consent to participate

: The animal studies were performed after receiving approval of the Institutional Animal Care and Use Committee at Seoul National University (IACUC approval no. SNU070723-2). All the animals were treated and handled in accordance with the “Recommendations for Handling of Laboratory Animals for Biomedical Research” complied by the Committee on the Safety and Ethical Handling Regulation for Laboratory Experiments in the School of Dentistry at Seoul National University.

: Not applicable.

: The authors declare that they have no competing interests.