1 Oncologic and Preventative Dermatology, San Gallicano Dermatological Institute, IFO, Rome, Italy, The originally published version of this article is available online at <a href="https://www.doi.org/10.23736/S0392-0488.18.06082-0">https://www.doi.org/10.23736/S0392-0488.18.06082-0</a>.