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Table 1 Number of affected individuals in the first-degree relatives and the corresponding families.

From: "Familial" versus "Sporadic" intellectual disability: contribution of common microdeletion and microduplication syndromes

Affected Individuals

Families (%)

2

37 (36.6%)

3

36 (35.6%)

4

18 (17.8%)

5

5 (4.9%)

6

2 (1.98%)

8

2 (1.98%)

12

1 (0.99%)