Affiliation: | 1. Nursing Policy and Research Institute, Biobehavioral Research Center, Division of Clinical Nursing Science, Yonsei University College of Nursing, , Seoul, Korea;2. Nursing Policy and Research Institute, Division of Clinical Nursing Science, Yonsei University College of Nursing, , Seoul, Korea;3. Division of Clinical Nursing Science, Yonsei University College of Nursing, , Seoul, Korea;4. Divisiont of Cardiology, Yonsei University College of Medicine, , Seoul, Korea |