1. Department of Internal Medicine and
2. Thoracic Medicine Center, Department of Medicine and Surgery, National Taiwan University Hospital Yunlin Branch, Douliu City, Taiwan;
3. Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan;
4. Department of Internal Medicine, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan;
5. Department of Medicine, National Taiwan University Cancer Center, Taipei, Taiwan; and
6. Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan