A Problem in PARADIGM-HF: What about Black Patients?

In PARADIGM-HF, a combination of the neprilysin inhibitor sacubitril and the angiotensin receptor blocker valsartan reduced cardiovascular death and hospitalizations for heart failure compared to the ACE inhibitor enalapril. But by studying so few black patients, who have historically responded less favorably to many heart failure drugs, can we trust its widespread use in this population?