1 Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
2 Guangzhou Laboratory, Guangzhou, China.
3 Institute of Biological Products, National Institutes for Food and Drug Control, Beijing, China.
4 Department of Genetic Medicine, Weill Cornell Medical College, New York, NY, United States.
5 MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.