1. School of Nursing, University of North Carolina at Chapel Hill
2. Department of Family and Community Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina
3. Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina
4. Department of Public Health Sciences, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1063 squandt@wfubmc.edu