Funding for this research was provided by:
Medical Research Council (102215/2/13/2, MR/M020894/1, MC_UU_12013/2)
Biotechnology and Biological Sciences Research Council (BB/I025263/1, BBI025751/1)
Economic and Social Research Council (ES/N000382/1)
Text and Data Mining valid from 2020-04-07
Received: 27 November 2019
Accepted: 26 March 2020
First Online: 7 April 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the ALSPAC Ethics and Law Committee and the Local Research Ethics Committees. Informed consent for the use of data collected via questionnaires and clinics was obtained from participants following the recommendations of the ALSPAC Ethics and Law Committee at the time.
: Not applicable
: The authors declare that they have no competing interests.