1. College of Nursing, Seoul National University, Seoul, Korea.
2. Research Institute of Nursing Science, Seoul National University, Seoul, Korea.
3. Aeromedical Center, Korean Air, Busan, Korea.
4. Department of Nursing, Samsung Medical Center, Seoul, Korea.
5. Global Healthcare Center, Korea Health Industry Development Institute, Cheongju, Korea.
6. Department of Nursing, Asan Medical Center, Seoul, Korea.