Doctors caution, however, that any pregnancy in these women is high risk.

Doctors caution, however, that a patient's symptoms must always be placed in the context of how likely he or she is to have heart disease.

Doctors cautioned that the trial was too small to reach firm conclusions.

Doctors cautioned that it is too soon to judge her chances for a full recovery.

The doctors cautioned her not to rise at all.

Each faces a long, painful struggle, and doctors caution that a few may not survive the fight.

"I wouldn't go quite that far," the doctor cautioned her, his expression turning stern.

But doctors privately cautioned the team that the extent of the injury was not yet known.

The doctors had cautioned her against pushing too hard.

The doctor, though, has cautioned against Johnson's returning to professional basketball on a full-time basis.