1. Heart Failure Research Center, Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung, Taiwan
2. Department of Nursing, Ching Kuo Institute of Management and Health, Taiwan
3. College of Medicine, Chang Gung University, Taiwan
4. Department of Medical Research and Education, Cheng Hsin General Hospital, Taiwan
5. Department of Internal Medicine, National Taiwan University, Taiwan
6. School of Nursing, National Yang-Ming University, Taiwan