1Department of Physical Medicine and Rehabilitation, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
2Department of Physical Medicine and Rehabilitation, Yeungnam University College of Medicine, Daegu, Korea
Copyright © 2020 The Korean Society for Preventive 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 non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
CONFLICT OF INTEREST
The authors have no conflicts of interest associated with the material presented in this paper.
FUNDING
None.
AUTHOR CONTRIBUTIONS
Conceptualization: DP, MCC. Data curation: DP, MCC. Funding acquisition: None. Writing – original draft: DP, MCC. Writing – review & editing: DP, MCC.