Stieglitz, Jonathan http://orcid.org/0000-0001-5985-9643
Trumble, Benjamin C.
Kaplan, Hillard http://orcid.org/0000-0002-7398-7358
Gurven, Michael
Article History
Received: 22 January 2018
Accepted: 29 June 2018
First Online: 6 August 2018
Competing interests
: The authors declare no competing interests.