. 2020 May 22;42(2):96–106. doi: 10.4082/kjfm.20.0025
Copyright © 2021 The Korean Academy of Family Medicine
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure. 1.
Flowchart of the study.