Jang, Yun Jung
Choy, Yoon Soo
Nam, Chung Mo
Moon, Ki Tae
Park, Eun-Cheol http://orcid.org/0000-0002-2306-5398
Article History
Received: 2 August 2017
Accepted: 25 May 2018
First Online: 5 June 2018
Ethics approval and consent to participate
: The ethical committee of the Graduate School of Public Health in Yonsei University approved the study(2–1,040,939-AB-N-01-2016-313). This study did not require informed consent from patients since the datasets were completely anonymized and therefore contained no personal information on participants.
: The authors declare that they have no competing interests.
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