1. Department of Emergency Medicine, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
2. Department of Ophthalmology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
3. Department of Biostatistics, School of Medicine, Medical Research Collaboration Center, Kyungpook National University, Daegu, Korea
4. Department of Emergency Medicine, Yeungnam University College of Medicine, Daegu, Korea
5. Department of Emergency Medicine, Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
6. Department of Emergency Medicine, Daegu Catholic University Medical Center, Daegu, Korea
7. Department of Preventive Medicine, Daegu Catholic University School of Medicine, Daegu, Korea