1. Thoracic paravertebral blocks in abdominal surgery – a systematic review of randomized controlled trials 
K. El-Boghdadly, C. Madjdpour, K.J. Chin 
British Journal of Anaesthesia 
Volume 117, Issue 3, Pages (September 2016)
DOI: /bja/aew269
Copyright © 2016 The Author(s) Terms and Conditions

2. Fig 1
Flowchart of identified, screened, eligible and included studies.
British Journal of Anaesthesia  , DOI: ( /bja/aew269)
Copyright © 2016 The Author(s) Terms and Conditions

3. Fig 2
Risk of bias assessment for included randomized controlled trials.
British Journal of Anaesthesia  , DOI: ( /bja/aew269)
Copyright © 2016 The Author(s) Terms and Conditions