Li-Ju Lin1, Yu-Chang Hsu1, Hsien-Wen Kuo2. 1. Health Promotion Administration, Ministry of Health and Welfare, Taipei, Taiwan, ROC. 2. Alliance of Healthy Cities in Taiwan, Taipei, Taiwan, ROC; Institute of Environmental and Occupational Health Sciences, National Yang Ming University, Taipei, Taiwan, ROC. Electronic address: hwkuo@ym.edu.tw.