1. Division of Pulmonary and Critical Care Medicine, Mackay Memorial Hospital, Main Branch Hospital, Taipei 10449, Taiwan
2. Mackay Medicine, Nursing and Management College, Taipei 10449, Taiwan
3. Department of Thoracic Surgery, Mackay Memorial Hospital, Main Branch Hospital, Taipei 10449, Taiwan
4. Department of Diagnostic Radiology, Mackay Memorial Hospital, Main Branch Hospital, Taipei 10449, Taiwan
5. Semmelweis University, Budapest, Hungary
6. Division of Chest, Internal Medicine, Mackay Memorial Hospital, Main Branch Hospital, Taipei 10449, Taiwan