James Lind Library :: The epidemiologiocal principles and procedures involved in a study of the prophylactic value of an alum-precipated mixture of diphtheria toxoid and pertussis vaccine.

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Bell JA (1948a). The epidemiologiocal principles and procedures involved in a study of the prophylactic value of an alum-precipated mixture of diphtheria toxoid and pertussis vaccine. Thesis submitted to the School of hygiene and Publc Health of the Johns Hopkins University in conformity with the requirements for the Degree of Doctor of Public Health.

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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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