1. Hematopathology, Department of Pathology and Laboratory Medicine Children's Hospital Los Angeles Los Angeles California USA
2. Hematopathology, Department of Pathology and Laboratory Medicine Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
3. Keck School of Medicine University of Southern California Los Angeles California USA
4. Department of Pathology Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
5. Department of Pediatrics Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
6. Division of Oncology Children's Hospital of Philadelphia Philadelphia Pennsylvania USA