Andrade 2004.

Methods	RCT
Participants	School children
Interventions	BZN (n = 64) 7.5 mg/kg/day (8 weeks) Placebo (n = 65)
Outcomes	Incidence of ECG abnormalities Serological status recorded
Notes	Brazil 2004 Same study as Galvao 2003 with different outcomes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk
Allocation concealment (selection bias)	Low risk
Blinding of participants and personnel (performance bias) All outcomes	Low risk
Blinding of outcome assessment (detection bias) All outcomes	Low risk
Incomplete outcome data (attrition bias) All outcomes	High risk