title: Otto Ullrich: an appreciation.
authors.forename: J M
authors.initials: JM
authors.lastname: Opitz
mesh_terms: D000015:Abnormalities, Multiple / Q000266:history; D004314:Down Syndrome / Q000266:history; D005826:Genetics, Medical / Q000266:history; D005858:Germany; D049673:History, 20th Century; D006801:Humans; D013577:Syndrome; D014424:Turner Syndrome / Q000266:history