1 Lisa S. Kahalley, PhD, Department of Pediatrics, Section of Psychology, Baylor College of Medicine, Houston, TX; Rachel Peterson, PhD, Department of Psychology, The Hospital for Sick Children, Toronto, Ontario, Canada; M. Douglas Ris, PhD, Department of Pediatrics, Section of Psychology, Baylor College of Medicine, Houston, TX; Laura Janzen, PhD, Department of Psychology, The Hospital for Sick Children, Toronto, Ontario, Canada; M. Fatih Okcu, MPH, MD, Department of Pediatrics, Section of Hematology Oncology, Baylor College of Medicine, Houston, TX; David R. Grosshans, MD, PhD, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX; Vijay Ramaswamy, MD, PhD, Division of Haematology/Oncology, The Hospital for Sick Children, and Department of Paediatrics, The University of Toronto, Toronto, Ontario, Canada; Arnold C. Paulino, MD, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX; David Hodgson, MPH, MD, Department of Radiation Oncology, Princess Margaret Cancer Centre, Toronto, Ontario, Canada; Anita Mahajan, MD, Department of Radiation Oncology, The Mayo Clinic, Rochester, MN; Derek S. Tsang, MSc, MD and Normand Laperriere, MD, Department of Radiation Oncology, Princess Margaret Cancer Centre, Toronto, Ontario, Canada; WilliamE. Whitehead, MPH, MD and Robert C.Dauser, MD, Department of Neurosurgery, Division of Pediatric Neurosurgery, Baylor College of Medicine, Houston, TX; Michael D. Taylor, MD, PhD, Division of Neurosurgery, The Hospital for Sick Children, and Department of Surgery, The University of Toronto, Toronto, Ontario, Canada; Eric Bouffet, MD, Division of Haematology/Oncology, The Hospital for Sick Children, and Department of Paediatrics, The University of Toronto, Toronto, Ontario, Canada; Murali Chintagumpala, MD, Department of Pediatrics, Section of Hematology Oncology, Baylor College of Medicine, Houston, TX; and Donald Mabbott, PhD, Program in Neurosciences and Mental Health, Research Institute, The Hospital for Sick Children, and Department of Psychology, The University of Toronto, Toronto, Ontario, Canada.