Sanna, Simone
Esposito, Vincenzo
Andreasen, Jens Wenzel
Hjelm, Johan
Zhang, Wei
Kasama, Takeshi
Simonsen, Søren Bredmose
Christensen, Mogens
Linderoth, Søren
Pryds, Nini
Article History
Received: 24 March 2014
Accepted: 22 January 2015
First Online: 13 April 2015
Competing interests
: The authors declare no competing financial interests.