1. Efficacy and safety of different techniques of paravertebral block for analgesia after thoracotomy: a systematic review and metaregression 
A. Kotzé, A. Scally, S. Howell 
British Journal of Anaesthesia 
Volume 103, Issue 5, Pages (November 2009)
DOI: /bja/aep272
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

2. Fig 1 QUORUM flowchart showing included and excluded studies.
British Journal of Anaesthesia  , DOI: ( /bja/aep272)
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Scatter plots of visual analogue scores vs bupivacaine dosage. Bubble graphs depicting resting and dynamic visual analogue scores at 8, 24, and 48 h after thoracotomy. The diameter of each bubble is proportional to the number of patients in the PVB group(s) of each trial.
British Journal of Anaesthesia  , DOI: ( /bja/aep272)
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
Scatter plots of visual analogue scores vs ropivacaine dosage. Bubble graphs depicting resting and dynamic visual analogue scores at 24 h after thoracotomy. The diameter of each bubble is proportional to the number of patients in the PVB group(s) of each trial.
British Journal of Anaesthesia  , DOI: ( /bja/aep272)
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

5. Fig 4
PCA morphine consumption and pain scores. Bubble graphs depicting resting and dynamic visual analogue scores at 24 h after thoracotomy. The diameter of each bubble is proportional to the number of patients in the PVB group(s) of each trial.
British Journal of Anaesthesia  , DOI: ( /bja/aep272)
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions