Gombocz 2007.

Methods	Randomised double‐blind study (does not specify who was blinded)
Participants	40 patients undergoing coronary bypass surgery or aortic valve replacement. Exclusion criteria: 'redo' operation, hepatic disease, renal dysfunction, immunological disease, steroid treatment, intake of aspirin or other cyclooxygenase inhibitor within 7 days of surgery, known allergy to volume expanders used in the study
Interventions	1) 5.5% Gelatin (n = 20) 2) 6% Dextran 70 (n = 20)
Outcomes	Death Haemodynamic variables Blood transfused
Notes	Final follow‐up 44 hours
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	Unclear