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Boudny, Clara; Nievergelt, Helga; Braathen, Lasse R; Simon, Dagmar (2007). Wegener's granulomatosis presenting as pyoderma gangrenosum. Journal der Deutschen Dermatologischen Gesellschaft, 6(6), pp. 477-479. Berlin: Blackwell 10.1111/j.1610-0387.2007.06497.x
