1. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea.
2. Department of Thoracic and Cardiovascular Surgery, Dankook University College of Medicine, Cheonan, Korea.
3. Department of Radiology, Dankook University College of Medicine, Cheonan, Korea.
4. Department of Pathology, Dankook University College of Medicine, Cheonan, Korea.
5. Department of Nuclear Medicine, Dankook University College of Medicine, Cheonan, Korea.