Choi, Jae Woo
Kim, Seung-Ju
Park, Hye-Ki
Jang, Sung-In
Kim, Tae Hyun
Park, Eun-Cheol http://orcid.org/0000-0002-2306-5398
Article History
Received: 26 August 2018
Accepted: 16 October 2019
First Online: 30 October 2019
Ethics approval and consent to participate
: This study was exempted by ethical approval from the institutional review board of Yonsei University Graduate School of Public Health. The authors obtained all essential permission from the Health Insurance Review and Assessment Service (HIRA) to access the data before performing this study. Information for each patient was de-identified and anonymized by the HIRA.
: Not applicable
: None of the authors has declared any conflicts of interest associated with this study.