Funding for this research was provided by:
WALTHAM centre of pet nutrition
Received: 18 October 2018
Accepted: 26 August 2019
First Online: 18 September 2019
Ethics approval and consent to participate
: Ethical approval for ALSPAC was obtained from the ALSPAC Law and Ethics Committee and the Local Research Ethics Committees; the participants provided written informed consent. As ethical approval and consent was sought as part of the data collection process for ALSPAC, and as this study analyses retrospective data, no ethical approval or consent was specifically required for the present study.
: Not applicable.
: There are no financial competing interests to be declared. Author Carri Westgarth is a member of the editorial board (Associate Editor) of this journal, and played a role in the handling of this manuscript (see author contributions).