About the Authors
Department of Microbiology and Immunology, Mucosal Immunobiology and Vaccine Center, Institute of Biomedicine, The University of Gothenburg, Gothenburg, Sweden
The authors have declared that no competing interests exist.
Conceived and designed the experiments: EM MAT NYL. Performed the experiments: EM MAT. Analyzed the data: EM. Contributed reagents/materials/analysis tools: NYL. Wrote the paper: EM NYL.