1.   If the pain persists, call a doctor.

2.   If the pain persists, you must see a doctor.

3.   Once the pain persisted, it became annoying.

4.   If the pain persists, see a doctor.

5.   The pain persisted on follow up two years later.

6.   If the pain persists, you must see your doctor about it.

7.   Bone spurs formed, the pain persisted, and eventually the break was diagnosed.

8.   After she gave birth, the pain persisted, sending her through peaks and valleys of suffering.

9.   After the pain persisted for two months, the doctors arranged for a brain scan, which showed two hematomas.