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Brain morphine measurements.
| Collection date | Morphine conc. (ng/g tissue) |
| ED10 (n = 3) | 60.77 ± 6.24 |
| ED16 (n = 6) | 37.19 ± 6.71 |
| ED20 (n = 11) | 37.32 ± 6.10 |
| PND1 (n = 3) | 37.67 ± 13.90 |
| PND6 (n = 1) | 46.35 ± 0.00 |
| Control (n = 3) | Below limit of quantitation |
