R Hampel, S Breitner, W Zareba et al. Immediate ozone effects on heart rate and repolarisation parameters in potentially susceptible individuals. Occup Environ Med 2012;69:6 428–436. The authors of this paper noticed some errors in the numbers of the Tamp section of table 2. In the [95%–CI] column for Outside and summer, the first 5 numbers were missing a minus sign. Please see the correct version of the table below.