Davies, Jonathan
Sullivan, Sarah
Zammit, Stanley
Funding for this research was provided by:
Medical Research Council (102215/2/13/2)
Article History
Received: 30 May 2017
Accepted: 1 February 2018
First Online: 19 March 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 have, therefore, been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Written informed consent was obtained from participants after procedures had been fully explained.