Incidence of betapapillomaviruses in the tumour and perilesional healthy skin in patients with basal cell carcinoma depending on sex, age, hair colour, tumour subtype, its location and dissemination - Sitarz, Katarzyna; Kopec, Jolanta; Szostek, Slawa; Sulowicz, Joanna (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2021)