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WHO Guidelines for the Pharmacological and Radiotherapeutic Management of Cancer Pain in Adults and Adolescents. Geneva: World Health Organization; 2018.

Cover of WHO Guidelines for the Pharmacological and Radiotherapeutic Management of Cancer Pain in Adults and Adolescents

WHO Guidelines for the Pharmacological and Radiotherapeutic Management of Cancer Pain in Adults and Adolescents.

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Figure A1.1. The three-step analgesic ladder.

Figure A1.1The three-step analgesic ladder

From: ANNEX 1, Evaluation of Pain

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