1. Division of Infectious Diseases, Department of Medicine, Nowon Eulji University Hospital , Seoul 01830 , Republic of Korea
2. Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine , Seoul , Republic of Korea
3. Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine , Seoul , Republic of Korea
4. Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine , Seoul , Republic of Korea
5. Department of Radiology and the Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine , Seoul , Republic of Korea