This article was published in Psychological Medicine with some errors in the display of the author's names. This has been corrected online and in the article.
The authors apologise for this error.
22 August 2024: Due to technical disruption, we are experiencing some delays to publication. We are working to restore services and apologise for the inconvenience. For further updates please visit our website: https://www.cambridge.org/universitypress/about-us/news-and-blogs/cambridge-university-press-publishing-update-following-technical-disruption
Published online by Cambridge University Press: 04 March 2021
This article was published in Psychological Medicine with some errors in the display of the author's names. This has been corrected online and in the article.
The authors apologise for this error.