1. Department of Pathology, University of Manitoba, Winnipeg, MB, Canada;
2. Department of Pathology, Stanford University School of Medicine, Palo Alto, CA;
3. Tucson Pathology Associates, Carondelet St. Joseph Hospital, Tucson, AZ;
4. Department of Pathology, Hospital Henri Mondor, Créteil, France;
5. Department of Pathology and Laboratory Medicine, Cedars Sinai Medical Center, Los Angeles, CA;
6. Department of Pathology, University of California San Diego, San Diego, CA;
7. Department of Pathology, University of Michigan, Ann Arbor, MI;
8. Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne, United Kingdom;
9. Department of Pathology, The Norwegian Radium Hospital, Oslo, Norway;
10. Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, WI;
11. Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE;
12. Department of Pathology, City of Hope National Medical Center, Duarte, CA; and
13. Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD