Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
There was an error in the affiliation for Steffen Borrmann in the acknowledgements. Dr Borrmann’s affiliation is currently listed as Heidelberg University, but should read "Department of Microbiology, Magdeburg University School of Medicine, Germany".
No competing interests declared.
