国家自然科学基金面上项目81670635;福建省自然科学基金项目2016J01532;福建省卫生计生中青年骨干人才培养项目2016-ZQN-36National Natural Science Foundation of ChinaGeneral Program,81670635;Natural Science Foundation of Fujian Province of China2016J01532;Young and Middle Aged Backbone Personnel Training Program of Fujian Provincial Health and Family Planning Commission2016-ZQN-36