685 USEFULNESS OF THE STEP II OF THE WHO ANALGESIC LADDER IN THE TREATMENT OF NON‐MALIGNANT CHRONIC PAIN: A MULTICENTRE PILOT‐STUDY |
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Authors: | J.M. L Pez‐Mill n,J.M. Gonz lez‐Valencia,M.A. Merino |
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Affiliation: | J.M. Ló Pez‐Millán,J.M. González‐Valencia,M.A. Merino |
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