Rowan Chlebowski, M.D., Ph.D., is one of the most influential breast cancer researchers in the world. As a clinical breast oncologist with a Ph.D. in reproductive biology, he has a credentialed clinical and research interest in breast cancer therapy and prevention, menopausal hormone therapy influences on cancer and chronic disease, and lifestyle influences on breast cancer incidence and outcome. He is best known for studying breast cancer issues in the Women's Health Initiative (WHI). He has published widely and led reports in well-cited journals such as JAMA, New England Journal of Medicine, Lancet, Lancet Oncology, Journal of Clinical Oncology, Journal of the National Cancer Institute and JAMA Oncology.

Dr. Chlebowski has received accolades and awards from the American Society of Clinical Oncology, the American Association for Cancer Research and other distinguished societies. He was one of 13 named WHI investigators awarded the "2016 AACR Team Science Award" for groundbreaking work in the women's health area. Based on his body of publications, Dr. Chlebowski has been on the Thomson Reuters "Most Influential Scientific Minds" for the last two years, which is based on the highest number of highly cited papers over the most recent decade, defined as the top 1 percent most cited in the area of clinical medicine. He is one of only 14 breast oncologists on the worldwide list.