| Region |
|||
|---|---|---|---|
| Europe | North America | Total | |
| Neither | 1 | 9 | 10 |
| TABx | 61 | 242 | 303 |
| US | 20 | 2 | 22 |
| Total | 82 | 253 | 335 |
Pearson Chi2 = 56.7492 Pr = <0.001
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