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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Laura Clara Grandi conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Eugenio L Heinzl conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Animal Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

All experimental protocols were approved by the Veterinarian Animal Care and Use Committee of the University of Parma, and complied with European law on the humane care and use of laboratory animals. The approval number: 2783, 26/01/2010.

Data Deposition

The following information was supplied regarding data availability:

All data is included in the manuscript

Funding

This experiment was in part supported by the European Commission Grant Cogsystem FP7-250013 awarded to Giacomo Rizzolatti. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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