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Resting Variables for All Arterioles Studied in Intravital Studies
| Dose/group | Number of vessels (n) | Resting diameter (μm) | Passive diameter (μm) | Resting tone (% of maximum) |
| Sham-Control | 15 | 41 ± 2 | 99 ± 4 | 58 ± 1 |
| 67 μg Fine TiO2 | 48 | 44 ± 2 | 100 ± 3 | 56 ± 1 |
| 10 μg Nano-TiO2 | 45 | 41 ± 1 | 93 ± 2 | 56 ± 1 |
