Doctor's

From the doctor's grim expression, it was clear he had somber news for the patient.

You should follow the doctor's advice.

The doctor's instructions are as follows: Take this medicine after meals.

All the doctor's efforts were in vain and the man soon died.

I wish I had followed the doctor's advice.

You had best follow the doctor's advice.

If it wasn't for the doctor's treatment, that patient would be dead.

Had he taken his doctor's advice, he might not have died.

A doctor's instruments must be kept absolutely clean.

The doctor's careful examination of the patient brought about his speedy recovery.