1. Department of Chest Medicine Taipei Veterans General Hospital Taipei Taiwan
2. Division of Pulmonology, Department of Internal Medicine Kao‐Hsiung Veterans General Hospital Tainan Branch Tainan Taiwan
3. Department of Nursing Taipei Veterans General Hospital Taipei Taiwan
4. Institute of Emergency and Critical Care Medicine National Yang Ming Chiao Tung University Taipei Taiwan
5. Division of Pulmonology, Department of Internal Medicine National Yang Ming Chiao Tung University Hospital Yi‐lan Taiwan