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Additional Information

Competing Interests

The authors declare no competing interests exist.

Author Contributions

Xiaofeng Wang conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper.

Daniel Graziotin analyzed the data, contributed reagents/materials/analysis tools, wrote the paper.

Juha Rikkilä performed the experiments, contributed reagents/materials/analysis tools, wrote the paper.

Pekka Abrahamsson conceived and designed the experiments, contributed reagents/materials/analysis tools, wrote the paper.

Human Ethics

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

An IRB approval for conducting empirical studies on human participants is not required by our institution. Informal consent was obtained from all participants.

Funding

The authors declare no funding mechanisms exist. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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