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Keo, Hong H; Duval, Sue; Baumgartner, Iris; Oldenburg, Niki C; Jaff, Michael R; Goldman, JoAnne; Peacock, James M; Tretinyak, Alexander S; Henry, Timothy D; Luepker, Russell V; Hirsch, Alan T (2013). The FReedom from Ischemic Events-New Dimensions for Survival (FRIENDS) registry: design of a prospective cohort study of patients with advanced peripheral artery disease. BMC cardiovascular disorders, 13(120), p. 120. BioMed Central 10.1186/1471-2261-13-120
