Does attrition bias longitudinal population-based studies on back pain?
| Autor: | Schmidt, Carsten O., Raspe, Heiner, Pfingsten, Michael, Hasenbring, Monika, Basler, Heinz Dieter, Eich, Wolfgang, Kohlmann, Thomas |
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| Zdroj: | In European Journal of Pain 2011 15(1):84-91 |
| Databáze: | ScienceDirect |
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