Journal of Biosocial Science /
Volume
45 /
Issue 06 /
Fri Nov 01 00:00:00 GMT 2013,
pp 721 - 742
Copyright © Cambridge University Press 2013 The online version of this article is published within an Open Access environment subject to the conditions of the Creative Commons Attribution-NonCommercial-ShareAlike licence <http://creativecommons.org/licenses/by-nc-sa/3.0/>. The written permission of Cambridge University Press must be obtained for commercial re-use.
DOI:
http://dx.doi.org/10.1017/S0021932013000199
(About DOI),
Published online: Tue May 21 00:00:00 BST 2013