1. Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
2. Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
3. Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
4. Beckman Coulter Diagnostics, Inc., West Sacramento, California, USA
5. Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, USA
6. BD Life Sciences–Diagnostic Systems, Sparks, Maryland, USA
7. Department of Pathology and Laboratory Medicine, Lifespan Academic Medical Center, Providence, Rhode Island, USA
8. Department of Pathology, University of Chicago Medical Center, Chicago, Illinois, USA
9. Department of Pathology, NorthShore University HealthSystem, Evanston, Illinois, USA
10. Department of Pathology and Laboratory Medicine, Weill-Cornell Medical College, New York, New York, USA