1. From the Department of Pathology and Laboratory Medicine, Weill Cornell Medicine/New York-Presbyterian Hospital, New York, New York (Goyal)
2. the Department of Pathology, Cleveland Clinic, Cleveland, Ohio (Booth)
3. the Departments of Biostatistics (Souers) and Proficiency Testing (Goodrich), College of American Pathologists, Northfield, Illinois
4. the Department of Pathology, H. Lee Moffitt Cancer Center, Tampa, Florida (Tabbara)
5. the Department of Pathology, University of Alabama Birmingham Hospital, Birmingham (Roberson)
6. the Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota (Henry)
7. the Department of Pathology and Laboratory Medicine, Wisconsin State Laboratory of Hygiene and University of Wisconsin, Madison (Sundling)
8. the Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada (Nguyen)