Study Assessing the Efficacy and Safety of Alpelisib Plus Fulvestrant or Letrozole, Based on Prior Endocrine Therapy, in Patients With PIK3CA Mutant, HR+, HER2- Advanced Breast Cancer Who Have Progressed on or After Prior Treatments

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Memorial Sloane Ketterin Cancer Ctr, New York

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Mercy Medical Center, Baltimore

Greater Baltimore Med Center Cancer Center, Baltimore

Virginia Oncology Associates, Norfolk

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Advent Health Cancer Institute, Orlando

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University of Louisville James Graham Brown Cancer Center, Louisville

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Yale University Yale Cancer Center, New Haven

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