国家自然科学基金青年基金81400815;江西省科技厅青年科学基金20142BAB215011;江西省卫生和计划生育委员会课题20161043 National Natural Science FoundationYoung Scientist Fund Project, 81400815;Jiangxi Provincial Department of Science and TechnologyYoung Scientist Fund Project, 20142BAB215011;Project of Health and Family Planning Commission of Jiangxi Province20161043