The Studies of Left Ventricular Dysfunction (SOLVD) experience with a placebo run-phase: Jeffrey L. Probstfield, Debra H. Weiner, Shrikant I. Bangdiwala, Linda Cahill, Henry Demots, Marie Galvao, Helena J. Henzlova, James Hill, Michel Joyal, and James B. Young for the SOLVD Investigators