Albrecht, Elke
Norheim, Frode
Thiede, Bernd
Holen, Torgeir
Ohashi, Tomoo
Schering, Lisa
Lee, Sindre
Brenmoehl, Julia
Thomas, Selina
Drevon, Christian A.
Erickson, Harold P.
Maak, Steffen
Article History
Received: 8 December 2014
Accepted: 9 February 2015
First Online: 9 March 2015
Competing interests
: The authors declare no competing financial interests.