国家自然科学基金.21175055,31372409;吉林省科技厅项目.20110739,20150204001YY;吉林省卫生计生委项目2015Z041;吉林大学白求恩计划 BNo.2012210资助This work was supported by the National Natural Science Foundation of China.21175055,31372409;Jilin Province Science and Technology Department.20110739,20150204001YY;the Health and Family Planning Commission of Jilin Province2015Z041;Jilin University Bethune Project B2012210