国家自然科学基金31560326,31660031;贵州省科技合作计划项目黔科合LH字[2015]7360;贵州省卫计委科技基金gzwjkj2015-1-010;National Natural Science Foundation of China31560326, 31660031;Science and Technology Planning Project of Guizhou ProvinceLH[2015]7360;Science and Technology Foundation of Guizhou Provincial Health and Family Planning Commissiongzwjkj2015-1-010