EPO and anemia (phenotype): Nine meta-analyses studied management of anemia such as erythropoietin stimulating agent use, 23 meta-analyses studied dialysis methods, 20 meta-analyses studied coronary revascularization techniques, and 20 meta-analyses compared blood pressure (BP) lowering agents, while 24 meta-analyses studied other cardiovascular interventions such as implantable cardioverter defibrillator (ICD), statin, or warfarin use.