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Bell JA (1948c). Use of two doses of an alum-precipitated mixture of diphtheria toxoid and pertussis vaccine.
JAMA 137:1276-1281.
Methodological context
- Control of allocation bias
- Background / Related records
- Control of observer bias
- Background / Related records
- Play of chance
- Background / Related records
- 'Intention-to-treat' analysis
- Background / Related records
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