Disclosure statement
No potential conflict of interest was reported by the author(s).
Data availability statement
The Millennium Cohort Study data are available from the UK Data Archive at beta.ukdataservice.ac.uk/datacatalogue/series/series?id = 2000031
Additional information
Funding
WJ is supported by a UK Medical Research Council (MRC) New Investigator Research Grant (MR/P023347/1), and acknowledges support from the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, which is a partnership between University Hospitals of Leicester NHS Trust, Loughborough University, and the University of Leicester.