title: Editorial.
authors: Siegfried
authors: S
authors: Kasper
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000188:drug therapy*; D001714:Bipolar Disorder; D001921:Brain / Q000473:pathology / Q000503:physiopathology*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011570:Psychiatry / Q000266:history*; D012559:Schizophrenia