About the Authors

Rolf Bergs

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

RolfB@prac.de

Affiliation PRAC, Bad Soden, Germany

Competing Interests

The author is affiliated with PRAC. This does not alter our adherence to PLOS ONE policies on sharing data and materials.