1. Section of Pulmonary and Critical Care Medicine, MedStar Washington Hospital Center, Washington, DC, USA
2. Medical Intensive Care Unit, MedStar Washington Hospital Center, Washington, DC, USA
3. Sections of Infectious Diseases and Pulmonary/Critical Care Medicine, MedStar Washington Hospital Center, Washington, DC, USA
4. Education, Section of Critical Care Medicine, MedStar Washington Hospital Center, Washington, DC, USA