Cao, Hua-Lian
Kang, Moon-Ho
Lee, Jin-Yong
Park, Won-Jong
Choung, Han-Wool
Choung, Pill-Hoon http://orcid.org/0000-0002-6763-0491
Article History
Received: 2 March 2020
Accepted: 23 April 2020
First Online: 25 May 2020
Ethics approval and consent to participate
: This study was performed in accordance with the Declaration of Helsinki for medical protocols. This study was reviewed and approved by the institutional review board at School of Dentistry, Seoul National University, Seoul, Korea (No.S-D20120009).
: Not applicable
: None declared