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| Species | Unclear† | No† | Yes† | Yes (%) |
| Mouse (n = 16) | 1 | 29 | 2 | 6 |
| Primate (n = 16) | 1 | 27 | 4 | 13 |
| Rat (n = 16) | 0 | 30 | 2 | 6 |
| All (n = 48) | 2 | 86 | 8 | 8* |
In phase 2 of the survey all 48 studies were assessed independently by two assessors, therefore numbers in each row sum to twice the number of studies.
Only 8% (4/48) of the 48 studies presented raw data for individual animals.
