Hutchison S J, Smalling R G, Albornoz M, Colletti P, Tak T, Chandraratna P A
Department of Medicine, Medical Center, University of Southern California School of Medicine, Los Angeles 90033.
Am J Cardiol. 1994 Nov 1;74(9):962-5. doi: 10.1016/0002-9149(94)90600-9.