
Robert Stein, MBBS, PhD, discusses the background and design of the OPTIMA trial of test-directed chemotherapy in ER-positive, HER2-negative early breast cancer.
Robert Stein, MBBS, PhD, is an honorary consultant oncologist at University College London (UCL) Hospitals and a professor of breast oncology at UCL Cancer Institute.

Robert Stein, MBBS, PhD, discusses the background and design of the OPTIMA trial of test-directed chemotherapy in ER-positive, HER2-negative early breast cancer.

Robert Stein, MBBS, PhD, discusses the data from the OPTIMA trial in ER+, HER2-negative early breast cancer and the trial's key clinical implications.

Robert Stein, MBBS, PhD, discusses data from the OPTIMA trial in ER+, HER2– early breast cancer.