1 Department of Dermatology, Azienda Ospedaliera Universitaria San Martino, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), San Martino University Hospital, Italian Research Hospital Foundation, Genoa, Italy.
2 Department of Dermatology, Azienda Ospedaliera Universitaria San Martino, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), San Martino University Hospital, Italian Research Hospital Foundation, Genoa, Italy. giuliaciccarese@libero.it.
3 Pathology Unit, E.O. Ospedali Galliera, Genova, Italy.