Text and Data Mining valid from 2018-02-26
Received: 15 September 2017
Accepted: 7 January 2018
First Online: 26 February 2018
Change Date: 3 June 2019
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via a link at the top of the paper.
: D.A.C. is a full-time employee and stockholder of Eli Lilly and Company. The remaining authors declare no conflicts of interest.