This article was published in Psychological Medicine with errors in Figures 2 and 3. This has now been corrected online and in the article.
The authors apologise for this error.
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Published online by Cambridge University Press: 24 March 2021
This article was published in Psychological Medicine with errors in Figures 2 and 3. This has now been corrected online and in the article.
The authors apologise for this error.