Jeon, Young-Jee http://orcid.org/0000-0002-8070-2453
Pyo, Jeehee http://orcid.org/0000-0001-7644-8088
Park, Young-Kwon http://orcid.org/0000-0001-9580-7840
Ock, Minsu http://orcid.org/0000-0001-9949-9224
Funding for this research was provided by:
Ministry of Health and Welfare (HI18C0446)
Article History
Received: 13 February 2020
Accepted: 19 November 2020
First Online: 27 November 2020
Ethics approval and consent to participate
: Since this study used a publically available secondary data source, we did not seek approval from the institutional review board. We also did not have to ask for the consent of the participants.
: Not applicable.
: The authors declare that they have no competing interests.