Clinical Features and Associations of 560 Cases of Motor Neuron Disease
JNNP 53:1043-1045, Li,T.,et al, 1990
Amyotrophic Lateral Sclerosis:Part 1. Clinical Features, Pathology, & Ethical Issues in Management
Ann Neurol 18:271-280, Tandan,R.,et al, 1985
Epidemiology of Motor-Neuron Diseases
NEJM 288:1047, Bobwick,A.R.,et al, 1973