1. Variation in transfusion rates within a single institution: Exploring the effect of differing practice patterns on the likelihood of blood product transfusion in patients undergoing cardiac surgery 
Claudia Cote, BSc, Jeffrey B. MacLeod, BSc, Alexandra M. Yip, MSc, Maral Ouzounian, MD, PhD, Craig D. Brown, MD, Rand Forgie, MD, Marc P. Pelletier, MD, MSc, Ansar Hassan, MD, PhD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 149, Issue 1, Pages (January 2015)
DOI: /j.jtcvs
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
Variability in unadjusted transfusion rates by surgeon, anesthesiologist, perfusionist and year.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

3. Figure 2
Unadjusted rates of transfusion over time by individual surgeon, anesthesiologist, and perfusionist.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions