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Study site characteristics.
| Characteristic | Sites, n (%) (N = 25) |
|---|---|
| Practice size | |
| Large group (more than seven physicians) | 9 (36.0) |
| Small group (2–7 physicians) | 12 (48.0) |
| Solo (one physician) | 4 (16.0) |
| Practice type, n (%) | |
| Academic center | 2 (8.0) |
| Nonacademic | 23 (92.0) |
| Geographic region, n (%) | |
| Northeast | 11 (44.0) |
| South | 9 (36.0) |
| West | 3 (12.0) |
| Midwest | 2 (8.0) |
