Pottegård, Anton
García Rodríguez, Luis Alberto
Rasmussen, Lotte
Damkier, Per
Friis, Søren
Gaist, David
Article History
Received: 4 December 2015
Revised: 18 March 2016
Accepted: 30 March 2016
First Online: 26 April 2016
Competing interests
: The authors declare no conflict of interest.