Byrne, Stephen L.
Erthmann, Pernille Østerbye
Agerbirk, Niels
Bak, Søren
Hauser, Thure Pavlo
Nagy, Istvan
Paina, Cristiana
Asp, Torben
Article History
Received: 20 October 2016
Accepted: 9 December 2016
First Online: 17 January 2017
Competing interests
: The authors declare no competing financial interests.