1. Chang Gung Medical Education Research Centre, Chang Gung Memorial Hospital, Linkou, ROC
2. College of Medicine, Chang Gung University, Taoyuan, ROC
3. School of Nursing, College of Nursing, Taipei Medical University, Taipei, ROC
4. Public Health Department, Kamuzu University of Health Sciences, Lilongwe, Malawi
5. School of Nursing, University of Washington, Seattle, WA, USA