Del Castillo 1965.
| Methods | Randomization by family unit. | |
| Participants | 400 household contacts of index cases treated at Quezon Institute, Manila, Phillippines. | |
| Interventions | Isoniazid 5‐10 mg/kg for 1 year. | |
| Outcomes | 1. Active tuberculosis | |
| Notes | — | |
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