题目内容
筛选受试者和签署知情同意书，正确的是
2021-12-16
A.先筛选受试者再签署知情同意书
B.先签署知情同意书再筛选受试者
C.筛选受试者和签署知情同意书两者同时进行
D.体检合格者签署知情同意书
E.体检不合格者签署知情同意书
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