Mapping the Presence of a Rare Mutation (IMAGE) McGill University Caption The researchers have estimated the frequency of the CAID allele throughout Quebec. The highest frequency is predicted in Charlevoix, even though most reported cases were in the Saguenay and Beauce. Credit McGill University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.