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Familial inheritance of a KCNQ1 5′ deletion. Three generation pedigree of the familial transmission of BWS. Arrow indicates proband (III-3). Affected family members in black shapes (individuals III-3, III-4 and III-14); dots in the shape indicate unaffected deletion carriers (individuals II-7 and II-10). These carriers and affected family members are related through a common maternal father and grandfather, respectively (individual I-4).
