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The demonstration of mutations giving rise to a slightly milder phenotype in A - T raises the interesting question of what range of phenotypes might occur in individuals in whom both mutations are milder .
 Disease: A - T
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