Funding for this research was provided by:
Economic and Social Research Council
Alan Turing Institute (EP/N510129/1)
National Institute for Health Research (BRC-1215-20011)
Received: 14 August 2020
Accepted: 10 January 2021
First Online: 15 January 2021
Ethics approval and consent to participate
: Ethical approval for the study was obtained from the ALSPAC Law and Ethics Committee. Full details of ethics committee approval references for ALSPAC can be found online (ExternalRef removed). Informed consent for the use of data collected via questionnaires and clinics was obtained from participants following the recommendations of the ALSPAC Law and Ethics Committee. Consent was implied via the written completion and return of questionnaires. Study participants have the right to withdraw their consent for specific elements of the study, or from the study as a whole at any time.
: Not applicable.
: The authors declare that they have no competing interests.