Derik L Davis1, Tatiana V D Sanses2, Alice S Ryan3. 1. Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, 22 S. Greene Street, Baltimore, MD, 21201, USA. ddavis@som.umaryland.edu. 2. Department of Obstetrics and Gynecology, Howard University College of Medicine, Washington, DC, USA. 3. Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.