The prevalence and etiological factors of onychomycosis in psoriatic patients - Romaszkiewicz, Alicja; Bykowska, Barbara; Zabłotna, Monika; Sobjanek, Michał; Sławińska, Martyna; Nowicki, Roman (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2018)