About the Authors

Juliana Yordanova

Contributed equally to this work with: Juliana Yordanova, Vasil Kolev

jyord@gmx.net

Affiliations Department of Neurology, University of Lübeck, Lübeck, Germany, Department of Cognitive Psychophysiology, Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria

Vasil Kolev

Contributed equally to this work with: Juliana Yordanova, Vasil Kolev

Affiliations Department of Neurology, University of Lübeck, Lübeck, Germany, Department of Cognitive Psychophysiology, Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria

Ullrich Wagner

Affiliations Department of Neurology, University of Lübeck, Lübeck, Germany, Department of Neuroendocrinology, University of Lübeck, Lübeck, Germany, School of Psychology, Bangor University, Gwynedd, United Kingdom

Rolf Verleger

Affiliation Department of Neurology, University of Lübeck, Lübeck, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: UW RV. Performed the experiments: UW RV. Analyzed the data: JY VK. Contributed reagents/materials/analysis tools: JY VK. Wrote the paper: JY VK. Developed additional software for data analysis: VK.