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Journal of Pain and Symptom Management > 2013 > 46 > 2 > 275-281
Journal of Pain and Symptom Management > 2007 > 34 > 3 > 244-252
Journal of Pain and Symptom Management > 2013 > 46 > 2 > 275-281
Journal of Pain and Symptom Management > 2007 > 34 > 3 > 244-252