Buchanan, Gordon F.
Richerson, George B.
Article History
First Online: 12 August 2016
Change Date: 12 September 2016
Change Type: Correction
Change Details: In the version of this article initially published, some of the funding sources were omitted from the Acknowledgements. This error has been corrected in the HTML and PDF versions of the article.
Competing interests
: The authors declare no competing financial interests.