1. Department of Epidemiology and Biostatistics, School of Public Health, Medical College of Soochow University, Suzhou, China
2. Department of Mathematics and Statistics, Faculty of Science, McMaster University, Hamilton, Ontario, Canada
3. Jiangsu Key Laboratory of Preventive and Translational Medicine for Major Chronic Non-communicable Diseases, School of Public Health, Soochow University, Suzhou, China