1. Nursing Policy Research Institute, College of Nursing, Yonsei University, Seoul, Korea.
2. Department of Nursing, Youngdong University, Youngdong, Korea.
3. Department of Internal Medicine, College of Medicine, Yonsei University, Seoul, Korea.
4. Division of Nursing, Yonsei University Health System, Seoul, Korea.
5. College of Nursing, University of Illinois at Chicago, Chicago, Illinois, U.S.A.
6. Health Systems Science·College of Nursing, University of Illinois at Chicago, Chicago, Illinois, U.S.A.