Vaz Fragoso CA, Hsu FC, Brinkley T, Church T, Liu CK, Manini T, Newman AB, Stafford RS, McDermott MM, Gill TM. Combined reduced forced expiratory volume in 1 second (FEV1) and peripheral artery disease in sedentary elders with functional limitations. J Am Med Dir Assoc. 2014 Sep; 15(9):665-70.