1. Methods of Rotation From Another Strong Opioid to Methadone for the Management of Cancer Pain: A Systematic Review of the Available Evidence 
Sarah McLean, MB, MAO, BCh, MRCPI, Feargal Twomey, MB, MRCPI 
Journal of Pain and Symptom Management 
Volume 50, Issue 2, Pages e1 (August 2015)
DOI: /j.jpainsymman
Copyright © 2015 American Academy of Hospice and Palliative Medicine Terms and Conditions

2. Fig. 1
Flow diagram: Preferred Reporting Items for Systematic Reviews and Meta-Analyses process of study selection.
Journal of Pain and Symptom Management  , e1DOI: ( /j.jpainsymman )
Copyright © 2015 American Academy of Hospice and Palliative Medicine Terms and Conditions