Department of Nursing, College of Nursing, Gachon University, Hambangmoe-ro 191, Yeonsu-gu, Incheon, Korea. parkkh@gachon.ac.kr. Graduate School, Department of Nursing, College of Nursing, Gachon University, Incheon, Korea. parkkh@gachon.ac.kr. Department of Physical Therapy, College of Health Science, Gachon University, Incheon, Korea. Graduate School, Department of Physical Therapy, College of Health Science, Gachon University, Incheon, Korea. Department of Nursing, College of Nursing, Gachon University, Hambangmoe-ro 191, Yeonsu-gu, Incheon, Korea. Graduate School, Department of Nursing, College of Nursing, Gachon University, Incheon, Korea. College of Nursing, Kosin University, Busan, Korea. Department of Nursing, College of Medicine, University of Ulsan, Ulsan, Korea. Department of Nursing, Yeoju Institute of Technology, Yeoju, Korea.