Text and Data Mining valid from 2019-04-17
Received: 5 January 2019
Accepted: 16 March 2019
First Online: 17 April 2019
Ethics approval and consent to participate
: The need for signed consent was waived by the Institutional Review Board of the University of Illinois at Urbana-Champaign due to the minimal risk nature of the experiment (protocol #09441). Subjects were informed prior to participation of the nature of the study that their data would remain anonymous and no attempt would be made to identify them, and that participation was voluntary and could be terminated at any point. They were also provided with contact information for author KW and the UIUC IRB board in the event that they had concerns or complaints.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.