Kim, Agnus M.
Park, Jong Heon
Cho, Seongcheol
Kang, Sungchan
Yoon, Tae Ho
Kim, Yoon http://orcid.org/0000-0002-0679-6594
Article History
Received: 13 September 2019
Accepted: 15 November 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Seoul National University Hospital with a waiver of informed consent and of its documentation (IRB No: 1504–075-665). Permission to access the de-identified data was granted by the National Health Insurance Service in Korea.
: Not applicable.
: The authors declare that they have no competing interests.