Chapman, Wendy W., Dowling, John N., Ivanov, Oleg, Gesteland, Per H., Olszewski, Robert T., Espino, Jeremy U., and Wagner, Michael M. (2008), Evaluating natural language processing applications applied to outbreak and disease surveillance, Computing Science and Statistics, 36, I2004Proceedings/ChapmanWendy/ChapmanWendy.paper.pdf