. 2015 May 26;370(1669):20140109. doi: 10.1098/rstb.2014.0109
© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Figure 1.
The trade-offs model, modified from Lee [31].