1. Shanghai Medical College, Fudan University, Shanghai, People's Republic of China.
2. National Population and Family Planning Key Laboratory of Contraceptive Drugs & Devices, Shanghai Institute of Planned Parenthood Research, Shanghai, People's Republic of China.
3. Huzhou R&D Center for Nutrition and Health, Shanghai Institutes for Biological Sciences, Zhejiang, People's Republic of China.
4. Department of Medicine, Mount Sinai School of Medicine, New York, New York.
5. Laboratory for Reproductive Biology, School of Life Science, University of Science and Technology of China, Shanghai, People's Republic of China.
6. The Vanderbilt Epidemiology Center, Institute for Medicine and Public Health, Department of Medicine, School of Medicine, Vanderbilt University, Nashville, Tennessee.