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Cohort selection of children with dilated cardiomyopathy from the Pediatric Cardiomyopathy Registry in a study to determine the prognostic value of serial changes in echocardiographic measurements. *Children not having an echocardiogram within 90 days before death or cardiac transplant in the first year, or within 6 months of their 1‐year anniversary of the first echocardiogram, if event free during the first year.
