1. Department of Pediatrics, Section of Diabetes and Endocrinology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
2. Heath Services Authority, Choctaw Nation of Oklahoma, Durant, Oklahoma
3. Oklahoma City Area Indian Health Service, Oklahoma City, Oklahoma
4. Department of Health Research, Cherokee Nation, Tahlequah, Oklahoma
5. Department of Health, Division of Research and Public Health, The Chickasaw Nation, Ada, Oklahoma
6. Tribal Health System, Absentee Shawnee Tribe, Shawnee, Oklahoma