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Journal of Pain and Symptom Management > 2002 > 24 > 1 > 17-31
Journal of Pain and Symptom Management > 2001 > 21 > 3 > 179-188
Journal of Pain and Symptom Management > 2002 > 24 > 1 > 17-31
Journal of Pain and Symptom Management > 2001 > 21 > 3 > 179-188