1Department of Medical Sciences, Section of Dermatology and Infectious Diseases, University of Ferrara, Ferrara, Italy

2Emilia-Romagna Cancer Registry, Functional Unit of Ferrara, Local Health Authority Ferrara, Ferrara, Italy

3Department of Translational Medicine and for Romagna, University of Ferrara, Ferrara, Italy

4Romagna Cancer Registry, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) “Dino Amadori,” Meldola, Forlì, Italy

5Cancer Prevention Unit, Local Health Authority, Forlì, Italy

Reprint requests to: Lucrezia Pacetti, MD, Section of Dermatology and Infectious Diseases, Department of Medical Sciences, University of Ferrara, via L. Ariosto 35, 44121 Ferrara, Italy. E-mail: [email protected]

The authors have declared they have no conflicts of interest.

A.B. and S.F. contributed equally to this work.

The study protocol was approved by the ethics committee at the Romagna Cancer Institute (ID: IRST100.37).