1. Family and Community Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina
2. Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina
3. Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina
4. Division of Research, Kaiser Permanente, Oakland, California
5. National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia