1. Institute of Medicine, Chung Shan Medical University; Taichung 402 Taiwan
2. Department of Pharmacy; Chung Shan Medical University Hospital; Taichung 402 Taiwan
3. Department of Occupational Safety and Health; College of Health Care and Management; Chung Shan Medical University; Taichung 402 Taiwan
4. Department of Occupational Medicine; Chung Shan Medical University Hospital; Taichung 402 Taiwan
5. Department of Early Childhood Educare; TransWorld University; Yun-lin 640 Taiwan
6. Division of Nephrology; Department of Internal Medicine; Chung Shan Medical University Hospital; Taichung 402 Taiwan