Karama, S
Ducharme, S
Corley, J
Chouinard-Decorte, F
Starr, J M
Wardlaw, J M
Bastin, M E
Deary, I J
Article History
Received: 21 August 2014
Revised: 4 November 2014
Accepted: 28 November 2014
First Online: 10 February 2015
Competing interests
: The authors declare no conflicts of interest.