UCLA Pulmonary Outpatient Clinic,, Los Angeles, California, United States
National Institutes of Health Clinical Center, 9000 Rockville Pike, Bethesda, Maryland, United States
University of Mississippi School of Medicine, Jackson, Mississippi, United States
National Heart, Lung and Blood Institute (NHLBI), Bethesda, Maryland, United States
Hospital San Gerardo di Monza, University of Bicocca Monza, Milan, Italy
National Heart, Lung and Blood Institute (NHLBI), 9000 Rockville Pike, Bethesda, Maryland, United States
University of Maryland Medical Systems/Greenbaum Cancer Center, Baltimore, Maryland, United States
Loyola University Medical Center, Maywood, Illinois, United States
Washington University/Barnes Jewish Hospital, Saint Louis, Missouri, United States
Wake Forest University, Winston-Salem, North Carolina, United States
National Institutes of Health Clinical Center, 9000 Rockville Pike, Bethesda, Maryland, United States