Choi, Jin Bong
Myong, Jun-Pyo
Lee, Yunhee
Kim, Inah
Kim, Jung Ho
Hong, Sung-Hoo
Ha, U-Syn
Article History
Received: 12 February 2020
Accepted: 18 June 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: This protocol was approved by the Institutional Review Board of The Hanyang University of Korea (No. HYU-2019-01-027). After the National Health Insurance Service review committee reviewed the ethics approval and research proposal, we had the permission to use the NHIS data. Informed consent was waived because anonymous and de-identified information was used for analysis.
: Not applicable.
: The authors declare no competing interests.