Acknowledgments
The author is grateful to the Paolo Procacci Foundation for its support in the preparation of this manuscript. Moreover, he expresses his gratitude to Mike Gregg of Taylor & Francis for his kind revision of the English language.
Conflict of interest
The author declares that he does not have any conflict of interest connected to the content of the article.
Declaration of interest
The contents of the paper and the opinions expressed within are those of the author, Giustino Varrassi, and it was the decision of the author to submit the manuscript for publication.
Peer reviewers on this manuscript have no relevant financial or other relationships to disclose.