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Tidal volume response to hypercapnia
| Postnatal age (days) | N | Tidal volume (μl) | ||
| Baseline | 2 min | 5 min | ||
| P2 | 16 | 10.4 ± 0.2 | 11.3 ± 0.5 | 13.3 ± 1.1 |
| P4 | 15 | 12.0 ± 0.4 | 14.0 ± 0.6 | 16.8 ± 1.7 |
| P6 | 13 | 14.2 ± 1.0 | 16.9 ± 0.9 | 17.8 ± 1.1 |
| P7 | 16 | 14.7 ± 0.5 | 18.4 ± 0.8 | 19.7 ± 1.0 |
| P12.5 | 10 | 25.0 ± 2.5 | 39.3 ± 3.2 | 38.0 ± 2.4 |
| P14.5 | 16 | 45.0 ± 3.1 | 64.2 ± 5.8 | 63.4 ± 5.3 |
| P21.5 | 10 | 57.3 ± 6.2 | 69.3 ± 5.9 | 60.0 ± 7.2 |
Values are mean ± S.E.; N, number of animals
