Double-gene Mutation in a Canadian Family (image) University of British Columbia Share Print E-Mail Caption Diagram shows incidence of a double-gene MS-causing mutation in a Canadian family. "M" = individuals with the mutation. Black circles and squares = individuals with MS. (No DNA was available for #8.) Credit Carles Vilarino-Guell/University of British Columbia Usage Restrictions None Share Print E-Mail 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.