Goodney PP, Nolan BW, Schanzer A, Eldrup-Jorgensen J, Bertges DJ, Stanley AC, Stone DH, Walsh DB, Powell RJ, Likosky DS, Cronenwett JL. Factors associated with amputation or graft occlusion one year after lower extremity bypass in northern New England. Ann Vasc Surg. 2010 Jan; 24(1):57-68.