[Prognostic study of motor neuron diseases in Japan].
D000367:Age Factors; D005260:Female; D006801:Humans; D008297:Male; D009046:Motor Neurons; D009468:Neuromuscular Diseases / Q000401:mortality* / Q000503:physiopathology; D011379:Prognosis; D011795:Surveys and Questionnaires; D013997:Time Factors