Funding for this research was provided by:
Yonsei University College of Dentistry Fund (6-2019-0014)
Article History
Received: 15 May 2019
Accepted: 3 December 2019
First Online: 4 May 2020
Compliance with ethical standards
: This study was conducted in accordance with the Declaration of Helsinki and was approved by the Ethical Review Board of Yonsei University Dental Hospital Institutional Review Board (IRB No. 2-2018-0060).
: Jun-Young Kim, Hansol Choi. Jin Hoo Park, Hwi-Dong Jung, and Young-Soo Jung declare that they have no conflict of interest. No financial compensation was derived from this work.