1 School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, United States.
2 Division of Infectious Diseases, Department of Internal Medicine, University of New Mexico, Albuquerque, NM, United States.
3 National Jewish Health, Denver, CO, United States.
4 Department of Medicine, Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado, Aurora, CO, United States.
5 Rocky Mountain Regional VA Medical Center, VA Eastern Colorado Health Care System, Aurora, CO, United States.