1. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
2. Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States
3. Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States
4. Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
5. Department of Medicine, University of North Carolina, School of Medicine, Chapel Hill, North Carolina, United States
6. Department of Medicine, School of Medicine, University of Miami, Miami, Florida, United States