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The death of Marie Curie at age 66 from aplastic anemia was probably caused by prolonged exposure to high doses of ionizing radiation , but it is not clear if this was due to alpha radiation or X-rays .
 Marie Curie, aplastic anemia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Text: {0} 
Answer:
 Marie Curie, aplastic anemia