Funding for this research was provided by:
Stichting voor de Technische Wetenschappen (HTSM 13306)
Text and Data Mining valid from 2019-07-15
Received: 29 January 2019
Accepted: 11 June 2019
First Online: 15 July 2019
Consent for publication
: Not applicable.
: The authors declare that they have no competing interests.