About the Authors

Sara Nilsson

Affiliation Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden

Johanna Sjöberg

Affiliation Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden

Mats Amundin

Affiliation Kolmården Wildlife Park, Kolmården, Sweden

Constanze Hartmann

Affiliation Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

Andrea Buettner

Affiliation Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

Matthias Laska

malas@ifm.liu.se

Affiliation Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ML SN JS MA. Performed the experiments: SN JS. Analyzed the data: ML SN JS MA CH AB. Contributed reagents/materials/analysis tools: ML MA CH AB. Contributed to the writing of the manuscript: ML SN JS MA CH AB.