Exact(8)
Almost at once federal agents began investigating physicians who prescribed narcotic drugs and early in the 1920s many such doctors were prosecuted and sent to jail.
The data collection seems to me like it is surveying and investigating "physicians".
The authors of this manuscript are members of a research project investigating physicians' sickness-certification practice.
Subjects, investigating physicians, study site personnel, and the study sponsor and its agents were blinded to treatment assignment.
Subjects, investigating physicians, and study site personnel were unblinded at the end of the Week 28 follow-up visit.
For example, a study investigating physicians' attitudes toward DNR of terminally ill cancer patients in Taiwan had a response rate of 18% [ 25].
In the case of diabetes, some studies investigating physicians' adherence to diabetes guidelines revealed low to moderate compliance [ 8, 30- 33].
The first found that follow-up telephone calls by investigating physicians to PCPs improved response rates from 62% to 92% (Bostick et al, 1992).
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