1. Department of Anesthesiology, School of Medicine, Hallym University, Chuncheon, Korea.
2. Department of Thoracic and Cardiovascular Surgery, School of Medicine, Hallym University, Chuncheon, Korea.
3. Division of Cardiology, Department of Internal Medicine, School of Medicine, Hallym University, Chuncheon, Korea.
4. Division of Pulmonology, Department of Internal Medicine, School of Medicine, Hallym University, Chuncheon, Korea.
5. Department of Urology, School of Medicine, Hallym University, Chuncheon, Korea.
6. Department of Emergency Medicine, School of Medicine, Hallym University, Chuncheon, Korea.