Ferrell, B.A., Stein, W.M., & Beck, J.C. (2000). The Geriatric Pain Measure: Validity, Reliability and Factor Analysis. Journal of the American Geriatrics Society, 48(2), 1669-73.

Ferrell, B.A., Stein, W.M., & Beck, J.C. (2000). The Geriatric Pain Measure: Validity, Reliability and Factor Analysis. Journal of the American Geriatrics Society, 48(2), 1669-73.

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