1. Department of Pulmonary & Critical Care Medicine, University Hospitals Cleveland Medical Center, Cleveland, Ohio;
2. Department of Internal Medicine, Geisinger Commonwealth School of Medicine, Danville, Pennsylvania;
3. Lake Erie College of Osteopathic Medicine, Erie, Pennsylvania;
4. Department of Pulmonary & Critical Care Medicine and
5. Department of Internal Medicine, Case Western Reserve School of Medicine, Louis Stokes Veterans Affairs Medical Center, Cleveland, Ohio
6. Department of Emergency Medicine, Case Western Reserve University School of Medicine, University Hospitals Cleveland Medical Center, Cleveland, Ohio; and