Jeong, Jae-Jung
Park, Sang-Eun
Lee, Hwan-Hee
Ji, Jong-Hun http://orcid.org/0000-0003-1087-3254
Park, Min-Sik
Park, Yong-Taek
Article History
Received: 1 January 2019
Accepted: 8 August 2019
First Online: 17 August 2019
Ethics approval and consent to participate
: The study was approved by the Catholic university Ethics Committee. Written informed consent, a prerequisite for study participation, was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.