Efficacy of diphenylcyclopropenone in alopecia areata: a comparison of two treatment regimens - Nowicka, Danuta; Maj, Joanna; Jankowska-Konsur, Alina; Hryncewicz-Gwóźdź, Anita (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2018)