1 Department of Family Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.
2 Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.
3 Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Allergy, Immunology & Rheumatology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan; Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan. Electronic address: jcwei@csmu.edu.tw.