Efficacy and safety of d-sotalol, a pure class III antiarrhythmic compound, in patients with symptomatic complex ventricular ectopy: Results of a multicenter, randomized, double-blind, placebo-controlled dose-finding study: S.H. Hohnloser, T. Meinertz, P. Stubbs, H.J.G.M. Crijns, J.-J. Blanc, P. Rizzon, B. Cheuvart Division of Cardiology, Department of Medicine, Goethe-University, Frankfurt, Germany. Circulation 1995;92:1517-25.