1. Department of Pulmonary and Critical Care Medicine, Chiayi Chang-Gung Memorial Hospital, Chang-Gung Medical Foundation, No. 6, West Sec., Chiapu Road, Putzu City, Chiayi 61363, Taiwan
2. Department of Respiratory Therapy, School of Medicine, Chang-Gung University, No.259, Wenhua 1st Rd., Guishan Dist., Taoyuan City 33302, Taiwan
3. Department of Medical Imaging and Intervention, Chang-Gung Memorial Hospital, Institute for Radiological Research, Chang-Gung University, Linkou, No.5, Fusing St., Gueishan Dist., Taoyuan City 33305, Taiwan
4. Department of Pathology, Chiayi Chang-Gung Memorial Hospital, Chang-Gung Medical Foundation, No. 6, West Sec., Chiapu Road, Putzu City, Chiayi 61363, Taiwan