Funding for this research was provided by:
National Research Foundation of Korea (2015-R1-A1-A3A0-4001267)
Text and Data Mining valid from 2018-09-24
Received: 9 January 2018
Accepted: 17 September 2018
First Online: 24 September 2018
: At the time of the study, H.W. Kim was the professor, Department of Nursing, Seoul National University in Korea. D. H. Kim was the professor, Department of Nursing, Woosuk University in Korea. Y. Kim was the assistant professor, Department of Nursing, Gachon University in Korea.
: This study was approved by the Institutional Review Board of Seoul National University. All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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