1. Assistant Professor of Medicine in the Division of Pulmonary, Critical Care, and Sleep Medicine , Froedtert and the Medical College of Wisconsin , Hub for Collaborative Medicine, 8th Floor, 8701 W. Watertown Plank Road , Milwaukee , WI 53226 , USA
2. Section of General Internal Medicine , Yale School of Medicine , New Haven , CT , USA
3. Division of General Internal Medicine , Johns Hopkins University School of Medicine , Baltimore , MD , USA
4. Department of Emergency Medicine , Rush Medical College , Chicago , IL , USA