Computer and internet use of urban african americans with type 2 diabetes in relation to glycemic control, emergency department use, diabetes-related knowledge, and health literacy. - Samal L; Yeh HC; Gary-Webb TL; Jackson CL; Brancati FL; Samal, Lipika; Yeh, Hsin-Chieh; Gary-Webb, Tiffany L; Jackson, Chandra L; Brancati, Frederick L (Diabetes Care, 2010)