Source: Conwell LJ, Cohen JW. Characteristics of people with high medical expenses in the U.S. civilian noninstitutionalized population, 2002. Statistical Brief #73. March 2005. Agency for Healthcare Research and Quality, Rockville, MD. Web site: http://www.meps.ahrq.gov/mepsweb/data_files/publications/st73/stat73.pdf. Accessed April 7, 2006.