Thomas Berlet1. 1. Inselspital/Bern University Hospital, Department of Intensive Care Medicine, Bern, 3010, Switzerland. thomas.berlet@hospital-lingen.de.
After publication of the original article [1], it came to the publisher’s attention that figure 2, associated with the Authors Response, had been accidently omitted. The original article has been corrected to include this figure. A citation to the figure has been inserted in the following sentence, “…our revised estimates yielded an overall sensitivity of 92 % (95 % CI 90 %-94 %) and specificity of 92 % (95 % CI 90 %-94 %; Fig. 2)…”