Clobex^® Spray Versus Taclonex^® Ointment: An Evaluation of the Efficacy and Safety of Clobex^® (clobetasol propionate) Spray, 0.05%, and Taclonex^® (calcipotriene 0.005%; betamethasone dipropionate 0.064%) Ointment in Subjects With Stable Plaque Psoriasis