Effectiveness of direct immunofluorescence for diagnosing autoimmune bullous diseases: data from the Central European referral department - Jałowska, Magdalena; Falkowski, Bogusz; Bowszyc-Dmochowska, Monika; Raptis-Bolwach, Maria; Gornowicz-Porowska, Justyna; Seraszek-Jaros, Agnieszka; Dmochowski, Marian (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2025)