1 Division of Pulmonary and Critical Care Medicine, University of Washington Medical Center, Seattle, WA 98195-6522. Electronic address: skap@uw.edu.
2 Division of Pulmonary and Critical Care Medicine, University of Virginia Health System, Charlottesville, VA 22908. Electronic address: steveherndon7@hotmail.com.
3 Division of Pulmonary and Critical Care Medicine, University of Virginia Health System, Charlottesville, VA 22908. Electronic address: smb4h@virginia.edu.
4 Division of Pulmonary and Critical Care Medicine, University of Virginia Health System, Charlottesville, VA 22908. Electronic address: yss6n@hscmail.mcc.virginia.edu.
5 Division of Pulmonary and Critical Care Medicine, University of Virginia Health System, Charlottesville, VA 22908. Electronic address: KE4Z@hscmail.mcc.virginia.edu.
6 Division of Pulmonary and Critical Care Medicine, University of Virginia Health System, Charlottesville, VA 22908. Electronic address: CB5AM@hscmail.mcc.virginia.edu.
7 Division of Pulmonary and Critical Care Medicine, Froedtert and Medical College of Wisconsin, Milwaukee, WI 53266. Electronic address: Jonathon.Truwit@froedtert.com.
8 Division of Pulmonary and Critical Care Medicine, Pasquerilla Healthcare Center, Georgetown University, Washington, DC 20007. Electronic address: vinayak@gunet.georgetown.edu.