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Journal of Pain and Symptom Management > 2006 > 32 > 2 > 118-128
Netherlands Journal of Medicine > 2001 > 59 > 5 > 209-212
Journal of Pain and Symptom Management > 2006 > 32 > 2 > 118-128
Netherlands Journal of Medicine > 2001 > 59 > 5 > 209-212