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Recipients of bone marrow transplants were pre - irradiated with a total dose of 10 . 2 Gy ( two doses of 5 . 1 Gy , 3 h apart ) .
 bone marrow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 bone marrow