1. College of Medicine and Health Science, Wuhan Polytechnic University, Wuhan 430023, China
2. Centers for Disease Prevention & Control of Huangpi District of Wuhan, Wuhan 430300, China
3. Department of Disease Control, Health and Family Planning Commission of Huangpi District of Wuhan, Wuhan 430300, China
4. Department of Maternal and Child Health, Xiangya School of Public Health, Xiangya School of Medicine, Central South University, Changsha 410008, China
5. Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China