A six-year study of diagnostic lower extremity imaging practice patterns and outcomes in the Veterans Affairs health care system - Scranton, Richard E; Dhingra1, Ravi; Lawler, Elizabeth V; Yucel, Kent; Guo, Amy; Chittamooru1, Subha P; Gagnon1, David R; Hay, Joel W; Gaziano1, John M (International Journal of Angiology, 2008)