1. La Jolla Institute for Allergy and Immunology, San Diego, California
2. Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
3. Department of Pulmonary and Critical Care Medicine, Oregon Health and Science University, Portland, Oregon
4. Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts; and
5. VA Portland Health Care System, Portland, Oregon