Berndt, Torsten http://orcid.org/0000-0003-2014-6018
Hyttinen, Noora
Herrmann, Hartmut http://orcid.org/0000-0001-7044-2101
Hansel, Armin http://orcid.org/0000-0002-1062-2394
Article History
Received: 28 September 2018
Accepted: 30 January 2019
First Online: 21 February 2019
Change Date: 22 February 2019
Change Type: Update
Change Details: The original PDF and HTML versions of this Article contained two typographical errors, one in the Results section and one in the Discussion section. In both instances the word ‘undefined’ was erroneously inserted. This has been corrected in both the PDF and HTML versions of the Article.
Competing interests
: The authors declare no competing interests.