1. Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, Pittsburgh, Pennsylvania
2. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Analytics Center, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
5. Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
6. University of Pittsburgh Medical Center Heart and Vascular Institute, Pittsburgh, Pennsylvania