1. College of Nursing, Seoul National University, Seoul, Korea.
2. Research Institute of Nursing Science, Seoul National University, Seoul, Korea.
3. Brigham and Women's Hospital, Boston, MA, USA.
4. Medical Information Management Team, Seoul National University Hospital, Seoul, Korea.
5. Harvard Medical School, Boston, MA, USA.
6. Partners Information Systems, Partners HealthCare, Boston, MA, USA.