Footnotes

• Twitter @SiegfriedU

• Contributors All authors wrote the commentary.

• Funding YO received support through the Alexander von Humboldt-Stiftung, Germany.

• Competing interests None declared.

• Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.

• Provenance and peer review Commissioned; internally peer reviewed.