Stöckle, Dorothee
Herrmann, Arvid
Lipka, Elisabeth
Lauster, Theresa
Gavidia, Richard
Zimmermann, Steffi
Müller, Sabine http://orcid.org/0000-0003-1467-3217
Article History
Received: 8 December 2015
Accepted: 6 July 2016
First Online: 8 August 2016
Competing interests
: The authors declare no competing financial interests.