[Opioids in chronic noncancer pain-are opioids different? A systematic review and meta-analysis of efficacy, tolerability and safety in randomized head-to-head comparisons of opioids of at least four week's duration].
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| Description | scientific article published in February 2015 |
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author: Romy Lauche Winfried Häuser Petra Klose |
| Publication date | February 1, 2015 |
| Language | German |
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