1 Department of Pathology, University of Texas Southwestern Medical Center Dallas, TX.
2 Department of Pathology, University of Chicago, Chicago, IL.
3 Department of Internal Medicine III, Ulm University Hospital, Ulm, Germany.
4 Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN.
5 Division of Hematology/Oncology, Children's Hospital Los Angeles, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA.
6 Division of Oncology and Pathology, Department of Clinical Sciences, Faculty of Medicine, Lund University, Lund, Sweden.
7 Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA.
8 Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, MD.