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Additional Information

Competing Interests

Thomas Backhaus is an Academic Editor for PeerJ. The authors have no other competing financial, non-financial, professional, or personal conflicts of interests.

Author Contributions

Enken Hassold conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Thomas Backhaus conceived and designed the experiments, analyzed the data, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Grant Disclosures

The following grant information was disclosed by the authors:

PhD fellowship of the Hans-Böckler-Foundation (HBS), Germany: grant number 321798.

Swedish Research Council (FORMAS) Project number 210-2012-759.

Funding

This study was conducted by means of a PhD fellowship of the Hans-Böckler-Foundation (HBS), Germany (grant number 321798), and was supported by a Grant from the Swedish Research Council (FORMAS) (project number 210-2012-759 ). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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