1. Department of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
2. Department of Occupational Medicine, Shuang Ho Hospital, New Taipei City, Taiwan
3. Department of Environment and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
4. Department of Otolaryngology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
5. Department of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
6. School of Nursing, College of Medicine, National Taiwan University, Taipei, Taiwan
7. Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, Taipei, Taiwan
8. Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Taipei, Taiwan