1. Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China
2. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Tri-Service General Hospital, Nei-Hu, Taipei, Taiwan, Republic of China
3. National Defense Medical Center, Taipei, Taiwan, Republic of China
4. Landseed Hospital, Tao-Yuan County, Taiwan, Republic of China
5. Wan Fang Hospital, Taipei, Taiwan, Republic of China