Callen’s ultrasonography in obstetrics and gynecology / edited by Mary E. Norton, MD, professor, Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, California, Leslie Scoutt, MD, FACR, professor of radiology, Yale University School of Medicine, chief, Ultrasound Section, associate program director, Diagnostic Radiology, medical director, Non Invasive Vascular Laboratory, Yale-New Haven Hospital, New Haven, Connecticut, Vickie A. Feldstein, MD, professor of radiology, University of California San Francisco School of Medicine, San Francisco, California