1. Department of Biostatistics and Epidemiology, Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
2. Center for Therapeutic Effectiveness Research, Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
3. Department of Medicine, Hematology Division; Johns Hopkins University School of Medicine; Baltimore MD USA
4. Department of Medicine, Cardiovascular Division, Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
5. Department of Medicine; Corporal Michael J. Crescenz Veterans Affairs Medical Center; Philadelphia PA USA