Concentration of proinflammatory cytokines in patients with ulcers as complications of type 2 diabetes mellitus - Kupczyk, Daria; Bilski, Rafał; Przewięźlikowski, Andrzej; Studzińska, Renata; Woźniak, Alina (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2021)