Agreement between percentage pain reductions calculated from numeric rating scores of pain intensity and those reported by patients with acute or cancer pain

Author: Cepeda M.S.   Africano J.M.   Polo R.   Alcala R.   Carr D.B.  

Publisher: Elsevier

ISSN: 0304-3959

Source: Pain, Vol.106, Iss.3, 2003-12, pp. : 439-442

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