湖南省自然科学基金14JJ2084;南华大学“蒸湘学者计划”资助;湖南省教育厅基金项目15C1203;湖南省卫生计生委基金编号:C2015-19Natural Science Foundation of Hunan Province14JJ2084;Zhengxiang Scholar Program of the University of South China;Fund Project of Hunan Province Department of Education15C1203;Health and Family Planning Commission of Hunan Province FundC2015-19