Funding
No funding or sponsorship was received for this study or publication of this article.
Authorship
All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, contributed to this manuscript, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.
Disclosures
The authors Luigi Mario Castello, Marco Baldrighi, Francesco Gavelli, and Gian Carlo Avanzi have nothing to disclose.
Compliance with Ethics Guidelines
This letter is a response to a previously published article and does not contain any studies with human participants or animals performed by any of the authors.
Open Access
This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.