This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
Wolff HG. PHILADELPHIA NEUROLOGICAL SOCIETY; NEW YORK NEUROLOGICAL SOCIETY, AND NEW YORK ACADEMY OF MEDICINE, SECTION OF NEUROLOGY AND PSYCHIATRY. AMA Arch NeurPsych. 1952;67(5):692–695. doi:10.1001/archneurpsyc.1952.02320170110016