The treating physician as active gatekeeper in the recruitment of research subjects.
| Autor: | Gurwitz, J H, Guadagnoli, E, Landrum, M B, Silliman, R A, Wolf, R, Weeks, J C |
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| Zdroj: | Medical Care; 2001 Dec, Vol. 39 Issue 12, p1339-1344, 6p |
| Databáze: | Complementary Index |
| Externí odkaz: |
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