A 38-yeаr-оld femаle presents tо the urgent cаre clinic repоrting a recurring skin condition on both elbows that has been present on and off for several months, worsening over the past 3 weeks. She denies fever, joint pain, or recent illness. No known drug allergies and takes no daily medications. She reports her father had a similar skin condition. Vital signs are within normal limits. Physical examination — skin —Bilateral extensor elbows with thick, erythematous, well-demarcated plaques —Lesions are symmetric in distribution —Overlying white-silver adherent scales noted; removal reveals a smooth, shiny surface with pinpoint bleeding —No vesicles, weeping, or honey-colored crusting —No lymphadenopathy; remainder of skin exam unremarkable Which of the following is the most appropriate first-line treatment for this patient's condition?