She asked if he would perform an operation on her.

About 600 such operations have been performed in the world.

The parents had the operation performed by a doctor in a hospital.

The family would have had to leave the country to find a doctor to perform the operation.

He has performed the operation on about 300 patients in Europe.

Will your doctor need to perform an operation on me as well?

There is a set of old women who make it their business to perform the operation.

This operation can only be performed after the window is created.

No one knows that better than the doctor who performs the operation.

At least a thousand such operations are performed each year.