Golding, Jean
Iles-Caven, Yasmin
Ellis, Genette
Gregory, Steven
Nowicki, Stephen
Article History
Received: 20 February 2018
Revised: 17 April 2018
Accepted: 18 May 2018
First Online: 9 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Ethical approval was obtained from the ALSPAC Ethics and Law Committee and the Local Research Ethics Committees.