Coulter, E H
McLean, A N
Hasler, J P
Allan, D B
McFadyen, A
Paul, L
Article History
Received: 16 December 2015
Revised: 8 July 2016
Accepted: 13 July 2016
First Online: 6 September 2016
Competing interests
: The website, ExternalRef removed, was developed by two of the authors (EHC, LP) at the University of Glasgow. However, as this is not a commercial entity there are no conflicts of interest. All the other authors declare no conflict of interest.