Table 1.
Participant characteristics
| Invited family members | 379 |
| Male | 174 (46%) |
| Female | 205 (54%) |
| Age (yr), mean (range) | 37.5 (1.3-85.1) |
| 0-18 | 70 (18.5%) |
| > 18 | 309 (81.5%) |
| First-degree relatives | 197 |
| Second-degree relatives | 182 |
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