About the Authors

Frank T. J. M. Zaal, Raoul M. Bongers
Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands

Corresponding Author


Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: FZ RB. Performed the experiments: FZ. Analyzed the data: FZ. Contributed reagents/materials/analysis tools: FZ. Wrote the paper: FZ RB.