Correction
The figure numbering in the HTML version of the original article (van Roosmalen et al. 2014) was listed incorrectly, while the PDF version was correct.
Figure 1 in the HTML version is Figure 2 in PDF
Figure 2 in the HTML version is Figure 3 in PDF
Figure 3 in the HTML version is Figure 4 in PDF
Figure 4 in the HTML version is Figure 5 in PDF
Figure 5 in the HTML version is Figure 6 in PDF
Figure 6 in the HTML version is Figure 7 in PDF
Figure 7 in the HTML version is a duplicate of additional Figure S3.
The publisher would like to apologise for this error.