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Overall frequencies across all timepoints for the original and modified Marshall score for the central nervous system.
| Original | Normal(0) | Mild(1) | Moderate(2) | Markedly(3) | Severe(4) |
| 210 | 48 | 125 | 84 | 190 | |
| Modified | Normal/Mild(0,1) | Moderate/Markedly(2,3) | Severe (4) | ||
| 258 | 209 | 190 | |||
