1. Department of Chronic Disease Prevention and Control, Shenzhen Nanshan Center for Chronic Disease Control, Shenzhen, People's Republic of China,
2. Department of Preventive Medicine, Zhejiang Provincial Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, People's Republic of China,
3. Department of Social Medicine, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province, People's Republic of China, and
4. Department of Science Research and Information Management, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China