First published online: 19 July 2019, Int J Epidemiol 2019, doi: https://doi.org/10.1093/ije/dyz150
In the originally published version of this article, the funding section was missing. This has since been added.
First published online: 19 July 2019, Int J Epidemiol 2019, doi: https://doi.org/10.1093/ije/dyz150
In the originally published version of this article, the funding section was missing. This has since been added.