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We describe 18 patients from several generations of 12 unrelated families who were heterozygous for 1 to 5 overlapping IFNGR1 frameshift small deletions and a wild-type IFNGR1 allele .
 overlapping IFNGR1 frameshift small deletions, wild-type IFNGR1 allele
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 overlapping IFNGR1 frameshift small deletions, wild-type IFNGR1 allele