Lauche, Romy
Spitzer, Julia
Schwahn, Barbara
Ostermann, Thomas
Bernardy, Kathrin
Cramer, Holger
Dobos, Gustav
Langhorst, Jost
Article History
Received: 10 August 2016
Accepted: 19 October 2016
First Online: 17 November 2016
Competing interests
: The authors declare no competing financial interests.