Text and Data Mining valid from 2018-01-15
Received: 11 May 2017
Revised: 28 August 2017
Accepted: 31 August 2017
First Online: 15 January 2018
Change Date: 9 April 2018
Change Type: Correction
Change Details: A correction to this article has been published and is linked from the HTML version of this article.
: The authors declare no competing financial interests.