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Published online by Cambridge University Press: 01 August 2014
A sample of sibships with two or more members affected by progressive muscular dystrophy has been drawn from the Mendel Institute's Eugenic Counseling file and examined with respect to the age of onset of the pathology (its clinical varieties being taken into account) in the members of the same sibship. Significant correlations have been found, thus suggesting the existence of characteristic ages of onset within each family.