Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (BU 1141/12-1 BU 1141/13-1)
Received: 5 February 2019
Accepted: 30 August 2019
First Online: 14 September 2019
: Animal experiments were approved by the University of Regensburg Laboratory Animal Committee. Procedures complied with the German Law on Animal Protection and the Institute for Laboratory Animal Research Guide for the Care and Use of Laboratory Animals, 1999. Experiments were conducted according to institutional and governmental regulations for animal use (Government of Unterfranken).
: Not applicable
: The authors declare that they have no competing interests.