1. Department of Molecular Genetics and Microbiology, University of New Mexico Health Science Center, Albuquerque, New Mexico 87131
2. Department of Internal Medicine, University of New Mexico Health Science Center, Albuquerque, New Mexico 87131
3. Lovelace Respiratory Research Institute, Albuquerque, New Mexico 87131
4. Department of Pathology, University of New Mexico Health Science Center, Albuquerque, New Mexico 87131
5. Department of Microbiology and Molecular Genetics, The University of Texas Houston Health Science Center, Houston, Texas 77030