McDermott MM, Hahn EA, Greenland P, Cella D, Ockene JK, Brogan D, Pearce WH, Hirsch AT, Hanley K, Odom L, Khan S, Criqui MH, Lipsky MS, Hudgens S. Atherosclerotic risk factor reduction in peripheral arterial diseasea: results of a national physician survey. J Gen Intern Med. 2002 Dec; 17(12):895-904.