1. Frankel Cardiovascular Center and Institute for Healthcare Policy and Innovation, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
2. Penn Cardiovascular Outcomes, Quality and Evaluative Research Center, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
3. Department of Emergency Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
4. Division of Pulmonary Critical Care and Sleep Medicine, Saint Louis University School of Medicine, Saint Louis, MO, USA
5. Division of Cardiology, Lancaster General Health, University of Pennsylvania Medicine, Lancaster, PA, USA
6. Division of Hematology and Oncology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
7. Division of Cardiology, Section of Vascular Medicine, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
8. Center for Vascular Emergencies, Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA