1. China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
2. National Protein Science Technology Center and School of Life Sciences, Tsinghua University, Beijing, China
3. Shandong Provincial Center for Disease Control and Prevention, Jinan, Shandong, China
4. Jinan Municipal Center for Disease Control and Prevention, Jinan, Shandong, China