Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (GRK 1097)
Universität Leipzig (formel.1)
Saxon Ministry of the Arts and Sciences
Received: 1 March 2019
Accepted: 21 May 2019
First Online: 29 May 2019
Ethics approval and consent to participate
: The use of the animals for the experiments and the methods were carried out in accordance with approved guidelines and had been approved by the local authorities Saxony (Landesdirektion Sachsen, Leipzig, Germany) based on the recommendation of the advisory Ethics Commission (T61/01, T63/09; Landesdirektion Sachsen, Leipzig, Germany). The treatment of the animals was carried out in accordance with the then in force European Council Directive 86/609/EEC and with the Directive 2003/65/EC (on the amendment of the former) and in accordance with the German Animal Welfare Act (TierSchG).
: Not applicable.
: The authors declare that they have no competing interests.