[1] Saint Paul’s Hospital,Division of Pulmonary and Critical Care, Department of Internal Medicine
[2] Chang Gung Memorial Hospital and College of Medicine,Department of Thoracic Medicine
[3] Chang Gung University,College of Medicine
[4] Chang Gung University,Department of Physical Medicine and Rehabilitation
[5] National Taiwan University Hospital,Biostatistics Unit, Clinical Trial Center
[6] Chang Gung Memorial Hospital,undefined