1. Division of Pulmonary, Critical Care Medicine, Allergy, and Clinical Immunology; Department of Medicine; The David Geffen School of Medicine at UCLA, Los Angeles, California
2. Division of Infectious Diseases, Department of Medicine, Loyola University Medical Center, Maywood, Illinois
3. Department of Medical Microbiology/Infectious Diseases, University of Manitoba, Max Rady College of Medicine, Winnipeg, Manitoba, Canada