9. Subject is a candidate for photo/systemic therapy. A subject is considered a candidate for photo/systemic therapy if, in the judgment of the Investigator, the subject requires any ultraviolet (UV) radiation or systemic therapy (eg, ultraviolet light B [UVB], psoralens and long-wave ultraviolet radiation [PUVA], methotrexate, cyclosporine, corticosteroids, oral retinoids, mycophenolate mofetil, thioguanine, hydroxyurea, sirolimus, tacrolimus, azathioprine, or approved biological agent) to control psoriasis, whether or not the subject has a history of receiving systemic therapy.