question archive 1) Were patients, health workers and study personnel 'blind' to treatment? 2) Were the groups similar at the start of the study? In terms of other factors that might affect the outcome such as age, sex, social class
1) Were patients, health workers and study personnel 'blind' to treatment? 2) Were the groups similar at the start of the study? In terms of other factors that might affect the outcome such as age, sex, social class
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1) Were patients, health workers and study personnel 'blind' to treatment?
2) Were the groups similar at the start of the study? In terms of other factors that might affect the outcome such as age, sex, social class.
