Erratum

After publication of the original article [1] it was brought to our attention that a couple of typos were incorporated into the published text. Please note that the third author name was incorrectly written as ‘Ryan G. Wager’. The correct author name should be ‘Ryan G. Wagner’.

Secondly, there was a repetition of the word ‘deaths’ in the first sentence of the results paragraph.

These have both now been corrected on the BioMed Central website.