Text and Data Mining valid from 2018-03-07
Received: 16 August 2017
Accepted: 2 February 2018
First Online: 7 March 2018
Change Date: 1 June 2018
Change Type: Correction
Change Details: The original version of this Article contained an error in the spelling of the author Stanley S. Chou, which was incorrectly given as Stan Chou. This has now been corrected in both the PDF and HTML versions of the Article.
: The authors declare no competing interests.