Andrade 1996.

Methods	RCT
Participants	School children
Interventions	BZD (n = 64) 7.5 mg/kg/day (8 weeks) Placebo (n = 65)
Outcomes	Serological status recorded Antibody titres reported Incidence of ECG abnormalities reported
Notes	Brazil, 1996
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
Incomplete outcome data (attrition bias) All outcomes	High risk