De Novo Versus Recurrent HER2-Positive Metastatic Breast Cancer: Patient Characteristics, Treatment, and Survival from the SystHERs Registry.

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Tripathy Debu, Brufsky Adam, Cobleigh Melody, Kaufman Peter A, Mason Ginny, O’Shaughnessy Joyce, Rugo Hope S, Swain Sandra M, Yardley Denise A, Chu Laura, Li Haocheng, Antao Vincent, Hurvitz Sara A