1. Department of Environmental and Occupational HealthMedical College, National Cheng Kung University
2. Tainan Science Park Clinic, Chi‐Mei Medical Center
3. Graduate Institute of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology
4. Graduate Institute of Occupational Safety and Health, Kaohsiung Medical University
5. Department of Occupational and Environmental MedicineMedical College, National Cheng Kung UniversityTaiwan