Human Reproduction Update 2011;17:829-847
We, the authors of the above mentioned article, would like to apologize to Dr Montgomery et al., for the omission of not adding the permission line to Figure 3.
The correct legend to Figure 3 should read: Figure 3. A theoretical model of the development of endometriosis, reproduced with permission from Oxford University Press (Montgomery et al. The search for genes contributing to endometriosis risk. Human Reproduction Update 2008;14:447–457).