8:00 AM. 225. Targeted microneedle delivery of nickel for diagnosis of allergic contact dermatitis.Zheng-Chi Lee1, Arben Nace, M.S.1, Dara Bakar, M.D.1, Elaine Kim, B.A.1, Spencer Tuohy, B.A.1, Leo Wang, MD, PhD, FAAD2 1Perelman School of Medicine, University of Pennsylvania, 2University of Pennsylvania