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. 2017 Jan 27;2017(1):CD011305. doi: 10.1002/14651858.CD011305.pub2
Study Reason for exclusion
Abels 1991 Participants: Oncology participants
Intervention: transfusion rates studied not different triggers.
Almeida 2013 Participants: non‐haematological oncological participants included. An RCT involving adults with cancer who were undergoing abdominal surgery.
Bercovitz 2011 Study design: review
Berger 2012 Study design: Ambidirectional cohort study
Intervention: one versus two units studied as opposed to a haemoglobin trigger.
Bruun 2011 Participants: non‐haematological oncological participants included
Carson 2014 A review including RCTs conducting on people with myocardial infarction, brain injury, stroke, or haematological disorders.
Holst 2013 Review
ISRCTN26088319 An RCT involving people with myelodysplastic syndrome.
Lightdale 2012 Study design: cohort study using retrospective control.
Mear 2014 Study design: cohort study using historical control.
NCT00202371 Study withdrawn prior to enrolment
NTR2684 Participants: participants receiving chemotherapy were excluded
Paananen 2009 Study design: no prospective element.
Patil 2013 Study design: no prospective element.
Prescott 2016 Review.
Yakymenko 2015 Participants: non‐haematological oncological participants included. An RCT involving adults with cancer.

RCT = randomised controlled trial