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Amyotrophic lateral sclerosis ( ALS ) is a neurodegenerative progressive currently untreatable disease , characterized by selective motor neuron degeneration ; the incidence and prevalence of ALS are greater in men than in women .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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