Kim, Bu Ki
Mun, Su Joung
Yang, Young Hoon
Kim, Ji Sun
Moon, Jun Hyung
Chung, Young Taek http://orcid.org/0000-0002-8203-8445
Article History
Received: 19 March 2019
Accepted: 22 November 2019
First Online: 11 December 2019
Ethics and consent to participate
: The study was protocol was reviewed and approved by the Public Internal Regulatory Board of the Ministry of Health and Welfare, Korea. It also strictly adhered to the principles of the Declaration of Helsinki. And all participants provided written consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.