Affiliation: | a School of Nursing, University of North Carolina, Chapel Hill, North Carolina b School of Nursing, University of North Carolina, Charlotte, North Carolina c School of Nursing, University of North Carolina, Greensboro, North Carolina d Division of General Medicine and Clinical Epidemiology, University of North Carolina, Chapel Hill, North Carolina e Heart Center, University of North Carolina, Chapel Hill, North Carolina f UNC Hospitals, Chapel Hill, North Carolina |