About the Authors

Nat F Brown

Contributed equally to this work with: Nat F Brown, Mark E Wickham

Mark E Wickham

Contributed equally to this work with: Nat F Brown, Mark E Wickham

Brian K Coombes

¤ Current address: Department of Biochemistry and Biomedical Sciences, McMaster University, Health Sciences Centre, Hamilton, Ontario, Canada

B. Brett Finlay

To whom correspondence should be addressed. E-mail: bfinlay@interchange.ubc.ca

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

NFB, MEW, BKC, and BBF wrote the paper.