1. Department of Nursing, Jeju National University College of Nursing, Jeju, Korea.
2. Department of Preventive Medicine, Chosun University School of Medicine, Gwangju, Korea.
3. Department of Computer Science and Statistics, Jeju National University College of Natural Sciences, Jeju, Korea.
4. Department of Journalism and Public Relations, Jeju National University College of Social Science, Jeju, Korea.
5. Department of Nursing, The Catholic University of Korea Seoul St. Mary's Hospital, Seoul, Korea.
6. Department of Nursing, Jeju National University Hospital, Jeju, Korea.