A group of researchers are looking to compare the effectiveness of metoprolol in managing atrial fibrillation to bisoprolol.
A group of researchers are looking to compare the effectiveness of metoprolol in managing atrial fibrillation to bisoprolol. The researchers recruited a cohort of patients and divided the patients into two groups, with one group receiving bisoprolol and another receiving metoprolol.
The patients were unaware of the medication received, but the doctors knew which medication the patient received.
Which of the following describes the study design?
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