She cautioned that the current study also had some limitations, however.

The new study had some limitations.

They acknowledge the study had some limitations because it compared two active interventions without using a comparison group that got no treatment.

But another expert cautioned that the study had some limitations and said patients shouldn't stop taking their medication before talking to a doctor.

Hudis, chief of the Breast Cancer Medicine Service at Memorial Sloan Kettering Cancer Center in New York City, said the new study had some limitations.