- ultraviolet B (UVB) or topical therapy (other than over-the-counter (OTC) moisturizers and shampoos) within the past 2 weeks (including topical corticosteroids, vitamin A and D analogues) with the exception of betamethasone valerate lotion (0.01%) for treatment of scalp lesions, and triamcinolone cream (0.1%) for lesions at least 3 inches away from the target lesions