Text and Data Mining valid from 2019-03-13
Received: 10 September 2018
Revised: 10 January 2019
Accepted: 11 February 2019
First Online: 13 March 2019
Compliance with ethical standards
: The above authors have no disclosures. The work has not been previously presented or published elsewhere. No IRB approval was required.
: The authors declare that they have no conflicts of interest.