1. Department of Family Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
2. College of Medicine, Chang Gung University, Taoyuan, Taiwan
3. Department of Health Management, Xiamen Chang-Gung Hospital, Xiamen, China
4. Department of Pulmonary and Critical Care Medicine, Xiamen Chang-Gung Hospital, Xiamen, China
5. Department of Oncology, Xiamen Chang-Gung Hospital, Xiamen, China