Funding for this research was provided by:
National Science Foundation (OIA1632891)
Text and Data Mining valid from 2018-07-14
Received: 15 May 2018
Accepted: 25 June 2018
First Online: 14 July 2018
Compliance with Ethical Standards
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.