388
Several cases of exon skipping in both normal controls and patients for whom no underlying defect could be found in genomic DNA were also observed , suggesting caution in the interpretation of exon deletions observed in ATM cDNA when there is no accompanying identification of genomic mutations . .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None