1. Department of Radiology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
2. Institute of Sericultural and Tea, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, P.R. China
3. Haining Economic Crop Technical Service Station, Haining Agricultural and Rural Bureau, Haining, Zhejiang 314400, P.R. China
4. Department of Environment & Health, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang 310051, P.R. China