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Many factors of a child 's birth and the condition of the newborn are linked to the future development of autism , but no single factor has been identified as the cause , a of forty previously published research studies concludes .
 autism
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 autism