1Department of Nursing, Changwon National University, Korea.
2Department of Nursing, Chungbuk National University, Korea.
3Department of Statistics, Inje University, Korea.
Copyright © 2016 Korean Academy of Nursing Administration
This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
This research is financially supported by Changwon National University in 2014.
None of the authors have any conflicts of interest to declare.