Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (INST 187/686-1, INST 187/686-1)
Biotechnology and Biological Sciences Research Council (BB/K002341/1, BB/L01368X/1)
Engineering and Physical Sciences Research Council (EP/F066104/1)
Received: 16 May 2018
Accepted: 24 August 2018
First Online: 26 September 2018
: The authors declare no competing interests.