Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Amyotrophic Lateral Sclerosis / Motor Neurons / Neuromuscular Diseases Type of study: Diagnostic_studies / Prognostic_studies Limits: Adult / Aged / Female / Humans / Male / Middle aged / Pregnancy Country/Region as subject: America do norte Language: En Journal: Can Med Assoc J Year: 1974 Document type: Article