title: A first step toward a molecular genetic analysis of amyotrophic lateral sclerosis.
authors.forename: P M
authors.initials: PM
authors.lastname: Conneally
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000235:genetics*; D002891:Chromosomes, Human, Pair 21; D008040:Genetic Linkage; D006801:Humans