In the April issue, the article by Luft et al (Luft UC, Bychkov R, Gollasch M, Gross V, Roullet J-B, McCarron DA, Ried C, Hofmann F, Yagil Y, Yagil C, Haller H, Luft FC. Farnesol Blocks the L-Type Ca2+ Channel by Targeting the α1C Subunit. Arterioscler Thromb Vasc Biol. 1999;19:959–966) contains the following error: The units of farnesol and other constituents should read μmol (rather than mmol/L) throughout the text, including the figure legends. The concentrations on the figures are correct. The authors apologize for the error.