Abemaciclib as initial therapy for advanced breast cancer: MONARCH 3 updated results in prognostic subgroups oleh Stephen Johnston, Joyce O’Shaughnessy, Miguel Martin, Jens Huober, Masakazu Toi, Joohyuk Sohn, Valérie A. M. André, Holly R. Martin, Molly C. Hardebeck, Matthew P. Goetz