1. RTI International–University of North Carolina at Chapel Hill Evidence-based Practice Center, Research Triangle Park, North Carolina
2. Department of Medicine, University of North Carolina at Chapel Hill
3. Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
4. Department of Psychiatry, University of North Carolina at Chapel Hill
5. Department of Internal Medicine, The Ohio State University College of Medicine, Columbus
6. Center for Rural Health Research, East Tennessee State University, Johnson City