About the Authors
- Peter Birkholz
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* E-mail: pbirkholz@ukaachen.de
Affiliation Department of Phoniatrics, Pedaudiology, and Communication Disorders, University Hospital Aachen and RWTH Aachen University, Aachen, Germany
Competing Interests
The author has declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: PB. Performed the experiments: PB. Analyzed the data: PB. Contributed reagents/materials/analysis tools: PB. Wrote the paper: PB.