1Department of Nursing, Kaya University, Gimhae, Korea.
2College of Nursing, Ewha Womans University, Seoul, Korea.
© 2016 Korean Society of Nursing Science
This is an Open Access article distributed under the terms of the Creative Commons Attribution NoDerivs License. (http://creativecommons.org/licenses/by-nd/4.0/) If the original work is properly cited and retained without any modification or reproduction, it can be used and re-distributed in any format and medium.
This manuscript is condensed form of the first author's doctoral dissertation from Ewha Womans University.
The authors declared no conflict of interest.