“The degree to which individuals have the capacity to obtain, process, and understand basic health information and services needed to make appropriate health decisions” (Ratzan, S. C., and R. M. Parker. 2000. Introduction. In National Library of Medicine Current Bibliographies in Medicine: Health Literacy. NLM Pub. No. CBM 2000-1. C. R. Selden, M. Zorn, S. C. Ratzan, and R. M. Parker, Editors. Bethesda, MD: National Institutes of Health, U.S. Department of Health and Human Services).