1. A systematic review of preoperative duplex ultrasonography and arteriovenous fistula formation 
Chee Siong Wong, MRCSI, Nuala McNicholas, MB, Bch, Donagh Healy, MRCSI, Mary Clarke-Moloney, PhD, J. Calvin Coffey, PhD, FRCS, Pierce A. Grace, MCh, FRCSI, Stewart R. Walsh, MCh, FRCS 
Journal of Vascular Surgery 
Volume 57, Issue 4, Pages (April 2013)
DOI: /j.jvs
Copyright © 2013 Society for Vascular Surgery Terms and Conditions

2. Fig 1
Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) flow diagram shows flowchart of systematic review. RCTs, Randomized controlled trials.
Journal of Vascular Surgery  , DOI: ( /j.jvs )
Copyright © 2013 Society for Vascular Surgery Terms and Conditions

3. Fig 2
Forest plot shows odds ratios (with 95% confidence interval) and pooled odds ratios based on random effects model.
Journal of Vascular Surgery  , DOI: ( /j.jvs )
Copyright © 2013 Society for Vascular Surgery Terms and Conditions