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Family structures of 1494 subjects in 580 families
| Number of families | Number of individuals | |
| Proband + parents + 0 sibling | 48 | 144 |
| Proband + parents + 1 sibling | 9 | 36 |
| Proband + parents + 2 sibling | 7 | 35 |
| Proband+1 sibling | 337 | 674 |
| Proband+2 sibling | 128 | 384 |
| Proband+3 sibling | 39 | 156 |
| Proband+4 sibling | 8 | 40 |
| Proband+5 sibling | 3 | 18 |
| Proband+6 sibling | 1 | 7 |
| Total | 580 | 1494 |
