Could a handbook serve as a useful educational intervention in improving disease knowledge? A cross-sectional study among patients with hidradenitis suppurativa in Poland - Lewandowski, Miłosz; Świerczewska, Zuzanna; Barańska-Rybak, Wioletta (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2022)