title: [What do you think of hierarchies?].
authors.forename: P
authors.initials: P
authors.lastname: Heintzen
mesh_terms: D004562:Electrocardiography; D006329:Heart Conduction System / Q000502:physiology*; D006608:Hierarchy, Social; D006801:Humans; D019365:Metaphor; D008955:Models, Cardiovascular