1. RTI International–University of North Carolina at Chapel Hill Evidence-based Practice Center
2. Department of Internal Medicine, The Ohio State University, Columbus
3. Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill
4. Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
5. RTI International, Research Triangle Park, North Carolina
6. Kaiser Permanente Center for Health Research, Portland, Oregon