Karima Addetia1, Roberto M Lang2. 1. Section of Cardiology, Department of Medicine, University of Chicago, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637, USA. 2. Section of Cardiology, Department of Medicine, University of Chicago, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637, USA rlang@medicine.bsd.uchicago.edu.