1 Department of Public Health, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
2 Institute of Environmental Medicine, Zhejiang University School of Public Health, Hangzhou, China.
3 Jiashan Institute of Cancer Prevention and Treatment, Jiaxing, China.
4 Department of Anorectal Surgery, Shaoxing People's Hospital, Shaoxing, China.
5 Department of Public Health, Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
6 Department of Public Health, National Clinical Research Center for Child Health of Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China.