1. Department of Family MedicineDitmanson Medical Foundation Chia‐Yi Christian HospitalChia‐YiTaiwan
2. Department of Environmental and Occupational HealthNational Cheng Kung UniversityTainanTaiwan
3. Department of NeurologyDitmanson Medical Foundation Chia‐Yi Christian HospitalChia‐YiTaiwan
4. Department of NursingChung Jen Junior College of Nursing, Health Science and ManagementChia‐YiTaiwan
5. Department of Occupational and Environmental MedicineNational Cheng Kung University HospitalTainanTaiwan
6. Occupational Safety, Health and Medicine Research CenterNational Cheng Kung UniversityTainanTaiwan