Reproduced with permission from Chang JB, Stein TA Reproduced with permission from Chang JB, Stein TA. Composite graphs for limb salvage. In: Chang JB, ed. Textbook of Angiology. New York, NY: Springer; 2000:835-845. Source: Lower Extremity Revascularization for Atherosclerotic Occlusive Disease, Peripheral Arterial Disease Citation: Dieter RS, Dieter RA, Jr., Dieter RA, III. Peripheral Arterial Disease; 2016 Available at: http://accesscardiology.mhmedical.com/DownloadImage.aspx?image=/data/books/1789/dieperi_ch37_f020.png&sec=123049655&BookID=1789&ChapterSecID=123049469&imagename= Accessed: October 29, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved