1 Department of Family Medicine, Taichung Veterans General Hospital, Taichung, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung, Taiwan.
2 Department of Family Medicine, Taichung Armed Forces General Hospital, Taichung, Taiwan; National Defense Medical Center, Taipei, Taiwan.
3 Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Allergy, Immunology & Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan; Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan. Electronic address: jccwei@gmail.com.