1. Department of Nursing, MacKay Junior College of Medicine, Nursing, and Management, Taipei 112, Taiwan
2. Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
3. Division of Pulmonary Medicine, Department of Internal Medicine, Taipei Medical University Hospital, Taipei 110, Taiwan
4. School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
5. Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan