Funding for this research was provided by:
Deutsche Forschungsgemeinschaft DFG (MA 2240/5-2, KO 2344/5-2, SFB 1158 A05, DIP BA 1007/7-1)
Received: 11 December 2018
Accepted: 28 January 2019
First Online: 5 February 2019
: All animal experiments were approved by the local animal welfare committee (Regierungspräsidium Karlsruhe, Germany, permission number: 35–9185.81/G-112/13).
: Not applicable.
: The authors declare that they have no competing interests.
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