1. Henan Provincial Research Institute for Population and Family Planning; Zhengzhou China
2. Key Laboratory of Birthdefects Prevention; National Health and Family Planning Commission; Zhengzhou China
3. College of Life Science and Technology and Human Genome Research Center; Huazhong University of Science and Technology; Wuhan China
4. Department of Clinical Laboratory; Liyuan Hospital; Tongji Medical Collage; Huazhong University of Science and Technology; Wuhan China