1 School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Family Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.
2 Department of Family Medicine, Taichung Armed Forces General Hospital, Taichung, Taiwan; National Defense Medical Center, Taipei, Taiwan.
3 Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan; Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan. Electronic address: jccwei@gmail.com.