Funding for this research was provided by:
National Science Foundation (EF-1266252, DGE- 0966227, CBET-1530563)
Österreichische Forschungsförderungsgesellschaft (ERA-NET SIINN project 849880)
Received: 8 February 2019
Accepted: 25 July 2019
First Online: 9 August 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.