About the Authors

Isabelle Piec

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Validation, Writing – original draft

i.piec@uea.ac.uk

Affiliation BioAnalytical Facility, Faculty of Medicine, University of East Anglia, Norwich, United Kingdom

Emma English

Roles Conceptualization, Methodology, Project administration, Writing – review & editing

Affiliation Faculty of Medicine and Health, University of East Anglia, Norwich, United Kingdom

Mary Annette Thomas

Roles Resources, Writing – review & editing

Affiliation WEQAS, Cardiff and Vale University Health Board, Cardiff, United Kingdom

Samir Dervisevic

Roles Conceptualization, Funding acquisition, Project administration, Resources, Writing – review & editing

Affiliation Virology Department, Norfolk and Norwich University Hospitals, Norwich, United Kingdom

William D. Fraser

Roles Conceptualization, Methodology, Writing – review & editing

Affiliations BioAnalytical Facility, Faculty of Medicine, University of East Anglia, Norwich, United Kingdom, Clinical Biochemistry Department, Norfolk and Norwich University Hospitals, Norwich, United Kingdom

William Garry John

Roles Conceptualization, Funding acquisition, Methodology, Resources, Supervision, Writing – review & editing

Affiliations Faculty of Medicine and Health, University of East Anglia, Norwich, United Kingdom, Clinical Biochemistry Department, Norfolk and Norwich University Hospitals, Norwich, United Kingdom

Competing Interests

The authors acknowledge the Norfolk, Suffolk, Essex and Bedfordshire Freemasons for their material support in providing funding for some equipment used in this study. This does not alter our adherence to PLOS ONE policies on sharing data and materials.