Thompson, A G B
Uphill, J
Lowe, J
Porter, M-C
Lukic, A
Carswell, C
Rudge, P
MacKay, A
Collinge, J
Mead, S
Article History
Received: 22 March 2014
Revised: 8 February 2015
Accepted: 11 February 2015
First Online: 21 April 2015
Competing interests
: The authors declare no conflict of interest.