Open Access Support Alexander Keller, University of Würzburg 5 August 2015 The open-access publication of this article was supported by the German Research Foundation (DFG) and the University of Wuerzburg in the funding programme "Open Access Publishing". Competing interests None declared
Open Access Support
5 August 2015
The open-access publication of this article was supported by the German Research Foundation (DFG) and the University of Wuerzburg in the funding programme "Open Access Publishing".Competing interests
None declared