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For instance , CMF-therapy for breast cancer ( where the cumulative dose is typically less than 20 " grams of cyclophosphamide ) carries an AML risk of less than 1 / 2000 , with some studies finding no increased risk compared to background .
 breast cancer
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:
 breast cancer