·P-20 The healthy responder effect in nonrandomized clinical trials: An example from the cardiac arrhythmia suppression trial
| Autor: | Hallstrom, Alfred P., Huther, Melissa, Leon Greene, H., CAST Investigators |
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| Zdroj: | In Controlled Clinical Trials August 1990 11(4):285-285 |
| Databáze: | ScienceDirect |
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