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Defining emergency department episodes by severity and intensity: A 15-year study of Medicare beneficiaries

Brian Kaskie*, Maksym Obrizan, Elizabeth A Cook, Michael P Jones, Li Liu, Suzanne Bentler, Robert B Wallace, John F Geweke, Kara B Wright, Elizabeth A Chrischilles, Claire E Pavlik, Robert L Ohsfeldt, Gary E Rosenthal and Fredric D Wolinsky,

BMC Health Services Research 2010, 10:173  doi:10.1186/1472-6963-10-173