Efficacy and effectiveness as aspects of cluster randomized trials with nursing home residents: Methodological insights from a pneumonia prevention trial
| Autor: | Van Ness, Peter H., Peduzzi, Peter N., Quagliarello, Vincent J. |
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| Zdroj: | In Contemporary Clinical Trials November 2012 33(6):1124-1131 |
| Databáze: | ScienceDirect |
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