1. Department of Urology, National Taiwan University Hospital, College of Medicine National Taiwan University, Taipei City 110, Taiwan
2. Department of Medicine, Section of Epidemiology and Population Sciences, Baylor College of Medicine, Houston, TX 77030, USA
3. Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan
4. Department of Family Medicine, Wan Fang Hospital, Taipei Medical University, Taipei City 110, Taiwan
5. Department of Family Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 110, Taiwan
6. Department of Occupational Medicine, Wan Fang Hospital, Taipei Medical University, Taipei City 110, Taiwan
7. Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 110, Taiwan
8. Department of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan