Incidence of transfusions at Stanford among CAD patients in Stanford cohort who had transfusions, in 6-month intervals from disease onset (2008-2016). For CAD patients who had a surgery, transfusions within 72 hours after surgery were removed from analysis. “No data” indicates either no transfusion information before 2008 or no transfusion information was found in the Stanford patients’ records during the 6-month interval.