title: Introduction to new special series.
authors.affiliation: Institute of Pathology, Medical University of Graz, Graz, Austria. helmut.popper@meduni-graz.at
authors.forename: Helmut H
authors.initials: HH
authors.lastname: Popper
mesh_terms: D000818:Animals; D006801:Humans; D010336:Pathology; D010506:Periodicals as Topic