1. Department of Epidemiology and Environmental Health, State University of New York at Buffalo, Buffalo, NY, USA;
2. Department of Biotechnical and Clinical Laboratory Sciences, State University of New York at Buffalo, Buffalo, NY, USA;
3. Department of Environmental Health, Peking University Health Science Center, Beijing, China;
4. Department of Biostatistics, State University of New York at Buffalo, Buffalo, NY, USA;
5. Nicholas School of the Environment, Duke University, Durham, NC, USA