Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (HA 2540/16-1, INST 292/120-1 FUGG, INST 292/119-1 FUGG)
Text and Data Mining valid from 2019-07-26
Received: 16 April 2019
Accepted: 15 July 2019
First Online: 26 July 2019
Ethics approval and consent to participate
: Ethical approval and consent to participate were not required for this work.
: Not applicable.
: The authors declare that they have no competing interests.