The analysis involved 913 patients whose average age was 61 and who were followed for at least four years.

The study involved nearly 500 patients at 33 medical centers.

He said the study involved very few patients, calling into question the meaning of the results.

All the cases involved patients who took the drug for longer than the recommended 10 days.

The study involved 282 patients with various types of cancer.

A group or series of case reports involving patients who were given similar treatment.

The study involved 54 patients in the early stages of the disease.

The California studies involved patients who walked into emergency rooms.

The research involved 411 patients in a hospital stroke unit with an average age of 70.

One of those studies involved 116 patients divided into three groups and studied for 14 weeks.