1. Department of Radiology, Vanderbilt University Medical Center, Medical Center North, Nashville, TN.
2. Department of Radiology, University of Wisconsin School of Medicine and Public Health, Clinical Science Center, E3/372, 600 Highland Ave, Madison, WI 53792-3252.
3. Department of Obstetrics and Gynecology, University of Wisconsin School of Medicine and Public Health, Madison, WI.
4. Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY.
5. Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY.
6. Department of Biostatistics and Medical Informatics, University of Wisconsin—Madison, Madison, WI.
7. Department of Radiology, University of Michigan Health System, Ann Arbor, MI.
8. University of Michigan Health System, Ann Arbor, MI.
9. Department of Obstetrics and Gynecology, University of Michigan Health System, Ann Arbor, MI.