Study designs of evaluations included in the review
Randomised controlled trials (RCTs) were included.
Specific interventions included in the review
Calcium antagonists.
Participants included in the review
Patients who have undergone angioplasty for stenosis.
Outcomes assessed in the review
Restenosis as assessed by angiography.
How were decisions on the relevance of primary studies made?
The authors do not state how the papers were selected for the review, or how many of the authors performed the selection.