National Institutes of Health Clinical Center, 9000 Rockville Pike, Bethesda, Maryland, United States
Johns Hopkins Hospital, Baltimore, Maryland, United States
Dept. of Health Evaluation Sciences, Penn State College of Medicine, Hershey, Pennsylvania, United States
UCSD School of Medicine, LaJolla, California, United States
National Jewish Medical and Research Center, Denver, Colorado, United States
Suburban Hospital, Bethesda, Maryland, United States
National Institutes of Health Clinical Center, 9000 Rockville Pike, Bethesda, Maryland, United States
University of Michigan, Ann Arbor, Michigan, United States
University of Maryland, College Park, Maryland, United States