1. Department of Public Health, The Graduate School, Konyang University, Daejeon, Korea.
2. Department of Hospital Management, College of Medical Science, Konyang University, Daejeon, Korea.
3. Department of Radiology, College of Medical Science, Konyang University, Daejeon, Korea.
4. Department of Emergency Medical Technology, College of Medical Science, Konyang University, Daejeon, Korea.
5. Department of Preventive Medicine, College of Medicine, Konyang University, Daejeon, Korea.