Ideas in this flowchart

• Funding and funder-role disclosure
• Open Access funding was enabled and organized by Projekt DEAL.
• The work was supported by the Karlheinz-Hartmann-Foundation in Hannover, Germany.
• The funder had no role in the study or publication process.
• The funder had no role in the design and conduct of the study.
• The funder had no role in data collection, management, analysis, or interpretation.
• The funder had no role in manuscript preparation, review, or approval.
• The funder had no role in the decision to submit the manuscript for publication.