Blum, A; Maltagliati-Holzner, P; Deinlein, T; Hofmann-Wellenhof, R. Collision tumors in dermoscopy : A new challenge]. Hautarzt. 2018; 69(9):776-779 Doi: 10.1007/s00105-018-4172-z Web of Science PubMed FullText FullText_MUG