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Heterozygotes for the ATM gene have no clinical expression of A - T but may be cancer prone with a moderate increase in in vitro radiosensitivity .
 Disease: A - T; Disease: cancer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: A - T; Disease: cancer