Biotechnology USA-based Amgen (Nasdaq: AMGN), the world's largest independent biotech firm, announced top-line results of the Phase III Aranesp (darbepoetin alfa) RED-HF (Reduction of Events With Darbepoetin Alfa in Heart Failure) Trial, showing the study did not meet its primary endpoint of reducing the composite endpoint of time to death from any cause or first hospital admission for worsening heart failure (Hazard Ratio 1.01, 95% CI 0.90, 1.13). 18 January 2013