1. Institute for Technology Assessment, Massachusetts General Hospital, Boston, Massachusetts, USA;
2. Department of Radiology, Harvard Medical School, Boston, Massachusetts, USA;
3. Department of Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta, Georgia; USA;
4. Division of Gastroenterology, University of Michigan Medicine, Ann Arbor, Michigan, USA;
5. Center for Health Decision Science, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.