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10623 Social & Preventive Medicine

For assembling cohos for Coho study, all of the following considerations are considered except

AThe coho must be free from the disease under the study
BStudy and control cohos should be equally susceptible to disease under study
CBoth groups should be comparable in respect of all the possible variable
DThe diagnostic and eligibility criteria of the disease must be defined after the staing of research
Social & Preventive Medicine
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