1. College of Nursing, Seoul National University, Seoul, Korea.
2. College of Medicine, Seoul National University · Department of Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
3. Department of Dental Anesthesiology, School of Dentistry, Seoul National University, Seoul, Korea.
4. Department of Nursing, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
5. College of Nursing · The Research Institute of Nursing Science, Seoul National University, Seoul, Korea.