1. Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, New Hampshire
2. Department of Medicine, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire
3. Veterans Affairs Outcomes Group, Department of Veterans Affairs Medical Center, White River Junction, Vermont
4. Department of Economics, Dartmouth College, Hanover, New Hampshire
5. Department of Surgery, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire
6. Urology Service, Department of Veterans Affairs Medical Center, White River Junction, Vermont
7. Department of Radiology, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire