Murphy TP, Reynolds MR, Cohen DJ, Regensteiner JG, Massaro JM, Cutlip DE, Mohler ER, Cerezo J, Oldenburg NC, Thum CC, Goldberg S, Hirsch AT. Correlation of patient-reported symptom outcomes and treadmill test outcomes after treatment for aortoiliac claudication. J Vasc Interv Radiol. 2013 Oct; 24(10):1427-35; quiz 1436.