1. Department of Safety, Health, and Environmental Engineering, Ming Chi University of Technology, 84 Gung-Juan Road, Taishan, New Taipei 24301, Taiwan
2. School of Public Health, Taipei Medical University, 250 Wu-Hsing Street, Taipei 110, Taiwan
3. Department of Soil and Environmental Science, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung 40227, Taiwan