1. Division of Hospital Medicine, Department of Medicine MedStar Georgetown University Hospital Washington DC USA
2. Division of Pulmonary, Critical Care, and Sleep Medicine Care New England Medical Group Pawtucket RI USA
3. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine The Warren Alpert Medical School of Brown University Providence RI USA
4. Division of Hospital Medicine, Department of Medicine MedStar Washington Hospital Center Washington DC USA
5. Division of General Internal Medicine University of Calgary Calgary AB Canada
6. Division of Ultrasound in Emergency Medicine Massachusetts General Hospital Boston MA USA