1. Prevalence of Breakthrough Cancer Pain: A Systematic Review and a Pooled Analysis of Published Literature 
Silvia Deandrea, MD, PhD, Oscar Corli, MD, Dario Consonni, MD, PhD, Walter Villani, BSc, Maria Teresa Greco, MD, Giovanni Apolone, MD 
Journal of Pain and Symptom Management 
Volume 47, Issue 1, Pages (January 2014)
DOI: /j.jpainsymman
Copyright © 2014 U.S. Cancer Pain Relief Committee Terms and Conditions

2. Fig. 1 Flowchart of article selection.
Journal of Pain and Symptom Management  , 57-76DOI: ( /j.jpainsymman )
Copyright © 2014 U.S. Cancer Pain Relief Committee Terms and Conditions

3. Fig. 2
Forest plot of breakthrough cancer pain (BTcP) prevalence for studies with a quality score of more than 75% of available points.
Journal of Pain and Symptom Management  , 57-76DOI: ( /j.jpainsymman )
Copyright © 2014 U.S. Cancer Pain Relief Committee Terms and Conditions