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| Haplotypes | Haddad | CCHS | Odds ratios |
|---|---|---|---|
| (n = 44) | (n = 99) | ||
| ATA/ATA | 7 | 6 | 4.74 |
| ATA/ATG | |||
| ATA/GCG | 21 | 28 | 2.39 |
| GCG/GCG | 16 | 65 | 1 |
ATA is the hypomorphic, HSCR predisposing RET haplotype and GCG the protective RET haplotype.
CCHS, congenital central hypoventilation syndrome; HSCR, Hirschsprung's disease.
