About the Authors

Merel Hazewindus

Affiliation Department of Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands

Guido R. M. M. Haenen

g.haenen@maastrichtuniversity.nl

Affiliation Department of Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands

Antje R. Weseler

Affiliation Department of Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands

Aalt Bast

Affiliation Department of Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands

Competing Interests

The company J.H. Heinz provided the ketchup for this study, which does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MH GRMMH ARW AB. Performed the experiments: MH. Analyzed the data: MH. Contributed reagents/materials/analysis tools: MH. Wrote the paper: MH GRMMH ARW. Drafting the article or revising it critically for important intellectual content: GRMMH ARW AB. Final approval of the version to be published: MH GRMMH ARW AB.