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Journal of Pain and Symptom Management > 2013 > 45 > 1 > 71-82
Journal of Pain and Symptom Management > 2003 > 26 > 6 > 1077-1092
Journal of Pain and Symptom Management > 2013 > 45 > 1 > 71-82
Journal of Pain and Symptom Management > 2003 > 26 > 6 > 1077-1092