Olweny 1976.

Methods	Randomised, parallel group, single‐centre trial (Kenya). Withdrawals: stated.
Participants	Baseline characteristics: 40 participants randomised. Mean age: not reported. Tumour staging: Ziegler and Magrath. Diagnosis: histopathology. Entry criteria: confirmed BL.
Interventions	C versus COM. Treatment duration was for 2 weeks (or as soon as toxicity abated). A third dose was given to 3 participants in C group and in one participant in COM group. Follow‐up: unclear.
Outcomes	Relapse. Overall survival. Response (remission, reduction in tumour size or no response).
Notes	Full text publication. Study type: remission induction.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Stated as "previously prepared random cards".
Allocation concealment (selection bias)	Low risk	The use of these cards also suggests that this may be adequate.
Blinding (performance bias and detection bias) All outcomes	Unclear risk	Not described.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Outcomes were reported.