1. Center for Biobehavioral Health, The Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio, USA.
2. Nationwide Children's Hospital, Columbus, Ohio, USA.
3. The Ohio State University College of Medicine, Columbus, Ohio, USA.
4. Hematology/Oncology/BMT, Nationwide Children's Hospital, Columbus, Ohio, USA.
5. Department of Medical Psychology, Cancer Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands.