The use of electronic health records for recruitment in clinical trials: a mixed methods analysis of the Harmony Outcomes Electronic Health Record Ancillary Study oleh Emily C. O’Brien, Sudha R. Raman, Alicia Ellis, Bradley G. Hammill, Lisa G. Berdan, Tyrus Rorick, Salim Janmohamed, Zachary Lampron, Adrian F. Hernandez, Lesley H. Curtis