Marioni, Riccardo E
Campbell, Archie http://orcid.org/0000-0003-0198-5078
Scotland, Generation
Hayward, Caroline
Porteous, David J
Deary, Ian J
Article History
Received: 26 November 2014
Revised: 28 June 2015
Accepted: 22 July 2015
First Online: 23 September 2015
Competing interests
: The authors declare no conflict of interest.