Successful treatment with apremilast of severe psoriasis exacerbation during nivolumab therapy for metastatic melanoma. Issue 1 (21st December 2020) - Foti, Caterina; Tucci, Marco; Stingeni, Luca; Hansel, Katharina; Lospalluti, Lucia; Frisario, Rosa; Giuffrida, Roberta; Romita, Paolo