Author/Authors :
TU, Jun Chengdu Municipal Center for Disease Control and Prevention, Chengdu, Sichuan, China , LIU, Ke-jian Dept. of Occupational and Environmental Health - School of Public Health, Tongji Medical College, Huazhong University of Sci-ence and Technology, Wuhan, Hubei, China , RAN, Long-ju Dept. of Occupational and Environmental Health - School of Public Health, Tongji Medical College, Huazhong University of Sci-ence and Technology, Wuhan, Hubei, China , PAN, Xing-ping Chengdu Municipal Center for Disease Control and Prevention, Chengdu, Sichuan, China
