Boldt 1993.

Methods	Randomised controlled trial. Method of allocation concealment not described in published report. Authors were contacted and confirmed the use of sealed opaque envelopes.
Participants	Men undergoing elective aortocoronary bypass grafting, who had a pulmonary capillary wedge pressure of less than 5mmHg after induction of anaesthesia.
Interventions	1) Intervention (n=15): Albumin 5%. 2) Control (n=15): No additional volume.
Outcomes	Deaths not reported. Authors were contacted and confirmed that there were no deaths in the albumin nor the control group.
Notes	Follow‐up to 1 day.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Low risk