1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, Korea.
3. Infectious Signaling Network Research Center, College of Medicine, Chungnam National University, Daejeon, Korea.
4. Department of Microbiology and Brain Korea 21 Project for Medical Science, Yonsei Univeristy College of Medicine, Seoul, Korea.
5. Cancer Research Institute, College of Medicine, Chungnam National University, Daejeon, Korea.