1. Prevalence and Characteristics of Anergia (Lack of Energy) in Patients With Acute Coronary Syndrome Shaffer, Jonathan A.; Davidson, Karina W.; Schwartz, Joseph E.; Shimbo, Daichi; Newman, Jonathan D.; Gurland, Barry J.; Maurer, Mathew; FRCPhysicians 2012 Articles Myocardial infarctionCardiovascular system--DiseasesVitalityMedical sciencesGerontologyEpidemiology