Table 1.
Randomization Schema
| Time Period | Mailed-Materials Group | Seminar Group |
|---|---|---|
| Period 1 | Mailed pretest | Mailed pretest |
| Period 2 | Mailed educational materials | Seminar followed by posttest at practice site |
| Period 3 | Posttest administered before the seminar at practice site | Educational materials handed out after posttest |