About the Authors

Kristine Lillebø Holm

Roles Data curation, Formal analysis, Investigation, Visualization, Writing – original draft

Affiliation Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Randi Gussgard Syljuåsen

Roles Conceptualization, Data curation, Resources, Writing – review & editing

Affiliation Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway

Grete Hasvold

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Radiation Biology, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway

Lene Alsøe

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, Lørenskog, Norway

Hilde Nilsen

Roles Conceptualization, Resources, Writing – review & editing

Affiliation Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, Lørenskog, Norway

Kristina Ivanauskiene

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Philippe Collas

Roles Conceptualization, Resources, Writing – review & editing

Affiliation Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Sergey Shaposhnikov

Roles Data curation, Investigation, Resources, Writing – review & editing

Affiliations Comet Biotech AS, Norgenotech AS, Oslo, Norway, Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Andrew Collins

Roles Conceptualization, Resources, Writing – review & editing

Affiliations Comet Biotech AS, Norgenotech AS, Oslo, Norway, Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Randi Larsen Indrevær

Roles Data curation, Investigation, Writing – review & editing

Affiliation Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Pål Aukrust

Roles Conceptualization, Resources, Writing – review & editing

Affiliations Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Rikshospitalet, Oslo, Norway, Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway

Børre Fevang

Roles Conceptualization, Resources, Supervision, Writing – review & editing

Affiliations Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Rikshospitalet, Oslo, Norway, Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway

Heidi Kiil Blomhoff

Roles Conceptualization, Funding acquisition, Project administration, Supervision, Writing – original draft

h.k.blomhoff@medisin.uio.no

Affiliation Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Competing Interests

HKB is a share-holder of AS Vitas. AS Vitas has no part or role in this study. We confirm that this commercial affiliation does not alter our adherence to PLOS ONE policies on sharing data and materials. SS and AC have shares in Norgenotech AS (Comet Biotech AS is a daughter company). These companies are engaged in research activities and have been involved in various EC and national studies, including Norwegian SkatteFunn tax deduction scheme awarded to R&D carrying SMEs. Their financial involvement in research is limited by covering salaries and materials for their employees. These companies have never been acting as funders and have no commercial interest in outcomes of the research projects they participate in. In this particular study AC and SS have been involved in all of the aspects connected with carrying out the comet assay on the samples of cells, which included the design of the comet assay experiments (including x-irradiation doses and conditions), carrying out the experimental part, data collection and analysis, general scientific discussions and manuscript preparation. Norgenotech & Comet Biotech financial involvement in the study: salary for SS and coverage of the reagents, materials, lab rent and technical assistance connected with carrying out the experiments (these actual costs of Norgenotech were covered by the University of Oslo with no commercial profit or overheads). Thus both AC and SS have no commercial or financial interests in the study outcomes, and their affiliated companies have not acted as funders in the study. Finally, we confirm that this commercial affiliation does not alter our adherence to PLOS ONE policies on sharing data and materials.