1. Department of Radiology, Center for Biomedical Imaging, NYU School of Medicine, NYU Langone Medical Center, 660 First Ave, 3rd Fl, New York, NY 10016.
2. Harvey L. Neiman Health Policy Institute, Reston, VA.
3. Department of Health Administration and Policy, George Mason University, Fairfax, VA.
4. Department of Radiology, Massachusetts General Hospital, Boston, MA.
5. Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA.