NCT05874726 2025-12-02Biological Sample Repository for Gastrointestinal DisordersBrigham and Women's HospitalActive not recruiting500 enrolled
NCT03281902 2025-03-06Genetic Analysis in Blood and Tumor Samples From Patients With Advanced or Metastatic Estrogen Receptor Positive and HER2 Negative Breast Cancer Receiving Palbociclib and Endocrine TherapyMayo ClinicActive not recruiting68 enrolled