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Table 2 Frequency of TTC8 c.669delA in various countries

From: A novel mutation in TTC8 is associated with progressive retinal atrophy in the golden retriever

  Country of ancestry
  UK Sweden Denmark France USA
Number tested 88 736 132 87 179
TTC8 c.669delA frequency 0.011 0.042 0.045 0.034 0.011
1 in # affected expected 7700 560 480 840 8000
1 in # carriers expected 45 12 12 15 45