About the Authors

Kevin R Foster, Hajo Grundmann
Kevin R. Foster and Hajo Grundmann wrote this article while at Wissenschaftskolleg zu Berlin (Institute for Advanced Study), Berlin, Germany. Kevin R. Foster is now at the Department of Biological and Environmental Sciences, University of Helsinki, Finland, and Hajo Grundmann is also at the National Institute for Public Health and the Environment, Bilthoven, The Netherlands, and the Department of Microbiology, University Medical Center, Groningen, The Netherlands.

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Competing Interests

The authors declare that they have no competing interests.