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Intravenous nonopioid analgesic drugs in chronic low back pain patients on chronic opioid treatment

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A crossover, randomised, double-blinded, placebo-controlled study

Wetzel, Leonore; Zadrazil, Markus; Paternostro-Sluga, Tatjana; Authried, Georg; Kozek-Langenecker, Sibylle; Scharbert, Gisela

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European Journal of Anaesthesiology: January 2014 - Volume 31 - Issue 1 - p 35-40
doi: 10.1097/EJA.0b013e328365ae28
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© 2014 European Society of Anaesthesiology