1. Methadone Analgesia in Cancer Pain Patients on Chronic Methadone Maintenance Therapy 
Paolo L Manfredi, MD, Gilbert R Gonzales, Andrea L Cheville, Craig Kornick, MD, Richard Payne, MD 
Journal of Pain and Symptom Management 
Volume 21, Issue 2, Pages (February 2001)
DOI: /S (00)

2. Fig. 1
Patient 1 opioid doses, routes, and days of treatment (y-axis: pain intensity)
Journal of Pain and Symptom Management  , DOI: ( /S (00) )

3. Fig. 2
Patient 2 opioid doses, routes, and days of treatment (y-axis: pain intensity)
Journal of Pain and Symptom Management  , DOI: ( /S (00) )