Funding for this research was provided by:
Text and Data Mining valid from 2018-07-12
Received: 3 May 2018
Accepted: 26 June 2018
First Online: 12 July 2018
Compliance with Ethical Standards
: All animal experiments were performed in accordance with the German Law on the protection of animals (TierSchG §§ 7–9) and were approved by a local ethics committee (LANUV, North-Rhine-Westphalia, Germany, reference number: 84-02.04.2011.A359).
: The authors declare that they have no conflict of interest.