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