Evaluation of the clinical usefulness of high-frequency ultrasonography in pre-operative evaluation of cutaneous melanoma – a prospective study - Pilat, Paweł; Borzęcki, Adam; Jazienicki, Mieczysław; Gerkowicz, Agnieszka; Szubstarski, Franciszek; Krasowska, Dorota (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2020)