1. More or less? The Goldilocks Principle as it applies to red cell transfusions 
A Shander, V.A. Ferraris 
British Journal of Anaesthesia 
Volume 118, Issue 6, Pages (June 2017)
DOI: /bja/aex135
Copyright © 2017 The Author(s) Terms and Conditions

2. Fig 1
A model to describe the interactions between anaemia, transfusion, comorbidities and unfavourable outcomes. The only logical scenario in which allogeneic blood transfusion can be beneficial is when its impact on reducing anaemia (the dashed line) and the associated negative impacts of anaemia outweigh its direct negative impact on outcomes. Modified from Shander and colleagues3 with permission.
British Journal of Anaesthesia  , DOI: ( /bja/aex135)
Copyright © 2017 The Author(s) Terms and Conditions