Correction: Emotional impact of screening: A systematic review and meta-analysis

Correction After the publication of this work [1], we became aware that two of the twelve studies included in the review [refs 25 and 30] were erroneously described as not having presented outcomes by randomisation (ie those randomised to screening vs those randomised not to be screened). Instead they were described as having presented outcomes according to those who were randomised and who attended vs those randomised not to be screened). We have now extracted the correct data from these two studies which resulted in revised pooled Standardised Mean Differences (SMDs). None of the conclusions reached in the uncorrected version of the paper has been revised in the light of these changes. We describe here the changes arising from this error as shown in corrected form in the accompanying revised Tables 1 and 2 and Figure 2.