Calcipotriol plus Betamethasone Dipropionate Gel Compared to Calcipotriol in the Gel Vehicle and Betamethasone Dipropionate in the Gel Vehicle in Scalp Psoriasis. A phase III study comparing a gel containing calcipotriol 50 mcg/g plus betamethasone dipropionate 0.5 mg/g (as dipropionate) with calcipotriol 50 mcg/g in the gel vehicle and betamethasone 0.5 mg/g (as dipropionate) in the gel vehicle, all applied once daily in the treatment of scalp psoriasis