1. Section of General Internal Medicine, Department of Medicine, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts
2. Department of Radiology, Boston University Aram V. Chobanian & Edward Avedisian School of Medicine, Boston, Massachusetts
3. The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth Cancer Center, Dartmouth Geisel School of Medicine, Hanover, New Hampshire