Nam, Jin Young
Park, Eun-Cheol http://orcid.org/0000-0002-2306-5398
Article History
Received: 19 March 2019
Accepted: 18 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: This study adhered to the tenets of the Declaration of Helsinki, and the study design was reviewed and approved by the Yonsei University Health System’s institutional review board (approval number: Y-2017-0002). This study obtained permission to access the database from the Korean National Health Insurance Data Sharing. The current study did not collect inform consent form the participants, because their information was fully anonymized and deidentified prior to analysis.
: Not applicable.
: Authors declare to have no competing interest.