1. Center for Reproductive Health Sciences, Washington University School of Medicine, St. Louis, MO 63110, USA.
2. Department of Biomedical Engineering, Washington University, St. Louis, MO 63110, USA.
3. Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO 63110, USA.
4. Department of Physics, Washington University, St. Louis, MO 63110, USA.
5. Division of Comparative Medicine, Washington University, St. Louis, MO 63110, USA.
6. Department of Medical Devices, Guangdong Food and Drug Vocational College, Guangzhou, Guangdong Province, P.R. China.
7. Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
8. Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA.
9. Department of Cardiology, Washington University School of Medicine, St. Louis, MO 63110, USA.