1. Department of Nursing, Chung-Ang University, Seoul, Korea.
2. Korea Social Science Data Archive, Asian Center, Seoul National University, Seoul, Korea.
3. Division of New Health Technology Assessment, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.
4. Division of Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.
5. Department of Preventive Medicine, University of Ulsan College of Medicine, Seoul, Korea.