1. Department of Health Policy, Harvard University, MA, USA
2. Center for Health Decision Science, Harvard School of Public Health, MA, USA
3. Department of Epidemiology, Erasmus MC, the Netherlands
4. Department of Radiology, Erasmus MC, the Netherlands
5. Division of General Medicine and Primary Care, Harvard Medical School, MA, USA
6. Department of Health Policy and Management, Harvard School of Public Health, MA, USA