1 Division of Pediatric Hematology, Oncology & Stem Cell Transplant, Department of Pediatrics, Children's Hospital of New York, Columbia University Medical Center, New York, New York, USA.
2 Division of Plastic Surgery, Department of Surgery, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
3 Department of Pathology and Laboratory Medicine, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
4 Pediatric Pathology, Children's and Women's Health Centre of British Columbia, Vancouver, British Columbia, Canada.
5 Division of Hematopathology, Department of Pathology and Laboratory Medicine, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
6 Departments of Pediatrics and Dermatology and Skin Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
7 Division of Pediatric Hematology/Oncology/BMT, Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.