Funding for this research was provided by:
Medical Research Council (G1002190)
National Institute of Child Health and Human Development (HD077482)
Received: 1 September 2020
Accepted: 10 March 2021
First Online: 15 April 2021
: The authors declares that they have no conflict of interest.
: The joint South London and Maudsley–Institute of Psychiatry, Psychology & Neuroscience Ethics Committee approved each phase of the study.