Negus B H, Willard J E, Hillis L D, Glamann D B, Landau C, Snyder R W, Lange R A
Department of Internal Medicine (Cardiovascular Division), University of Texas Southwestern Medical Center, Dallas 75235-9047.
Am J Cardiol. 1994 Mar 1;73(7):510-3. doi: 10.1016/0002-9149(94)90684-x.