Observational Studies of Patients in the Emergency Department: A Comparison of 4 Sampling Methods
| Autor: | Valley, Morgan A., Heard, Kennon J., Ginde, Adit A., Lezotte, Dennis C., Lowenstein, Steven R. |
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| Zdroj: | In Annals of Emergency Medicine August 2012 60(2):139-145 |
| Databáze: | ScienceDirect |
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