[Present status of clinical neurology in Japan. (2) Motor neuron disease].
D000690:Amyotrophic Lateral Sclerosis / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D009046:Motor Neurons; D009468:Neuromuscular Diseases / Q000453:epidemiology / Q000209:etiology