passages.id: 1158
passages.type: sentence
passages.text: Three hundred forty-one Tanzanian preschool children were randomly assigned to levamisole or placebo treatment given at three-month intervals .
entities.id: 1159
entities.type: intervention
entities.text: levamisole
entities.id: 1160
entities.type: intervention
entities.text: placebo
entities.id: 1161
entities.type: participant
entities.text: Three hundred forty-one Tanzanian preschool children