About the Authors
Centre for Biophotonics, University of Strathclyde, Glasgow, United Kingdom
Division of Infection and Immunity, Glasgow Biomedical Research Centre, University of Glasgow, Glasgow, United Kingdom
The authors have declared that no competing interests exist.
ORM, RSP, PG, and JMB conceived and designed the experiments and wrote the paper. ORM and VBG performed the experiments and analyzed the data. CMR and BHZ contributed reagents/materials/analysis tools.