Guarantor

The scientific guarantor of this publication is Prof. Hans Rolf Jäger.

Conflict of interest

The author of this manuscript declares no relationships with any companies, whose products or services may be related to the subject matter of the article.

Statistics and biometry

No complex statistical methods were necessary for this paper.

Informed consent

Written informed consent was not required.

Ethical approval

Institutional Review Board approval was not required because this is an invited commentary.

Study subjects or cohorts overlap

Not applicable

Methodology

• commentary