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Letter
In reply to Schnabel et al.

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Footnotes

  • Contributors All authors had equal contribution.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; internally peer reviewed.

Linked Articles

  • PostScript
    Alexander Schnabel Peter Kranke Christine Meyer-Frießem Peter K Zahn Stephanie Weibel Esther M Pogatzki-Zahn Lisa Oostvogels