Text and Data Mining valid from 2019-06-01
Received: 8 February 2019
Revised: 18 April 2019
Accepted: 28 May 2019
First Online: 1 June 2019
Change Date: 11 June 2019
Change Type: Correction
Change Details: A missing/incomplete table caption for table 4 was discovered after article was published.
Compliance with Ethical Standards
: All the authors declare that there are no conflicts of interest.