Harvey 1950.

Methods	Controlled prospective
Participants	Heart failure
Interventions	Warfarin
Outcomes	Death, stroke, pulmonary and peripheral embolism
Notes	180 participants
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Not randomised
Allocation concealment (selection bias)	High risk	Not randomised
Blinding of participants and personnel (performance bias) All outcomes	High risk	No blinding
Blinding of outcome assessment (detection bias) All outcomes	High risk	No blinding