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Journal of the American Geriatrics Society > 62 > 3 > 476 - 481
Journal of Pain and Symptom Management > 2006 > 32 > 2 > 118-128
Journal of the American Geriatrics Society > 62 > 3 > 476 - 481
Journal of Pain and Symptom Management > 2006 > 32 > 2 > 118-128