Gilbert, Duncan C
Serup-Hansen, Eva
Linnemann, Dorte
Høgdall, Estrid
Bailey, Charles
Summers, Jeff
Havsteen, Hanne
Thomas, Gareth J
Article History
Received: 27 August 2015
Revised: 7 October 2015
Accepted: 30 November 2015
First Online: 5 January 2016
Competing interests
: The authors declare no conflict of interest.