1. Morgan Stanley Children's Hospital of New York-Presbyterian, Columbia University, New York, NY;
2. Sheffield Children's Hospital, Sheffield, United Kingdom;
3. Keck School of Medicine, University of Southern California, Los Angeles, CA;
4. Institut Gustave Roussy, Paris, France;
5. Royal Marsden Hospital, Sutton, Surrey, United Kingdom;
6. Institut Curie, Villejuif, France;
7. University of Leicester, Leicester, United Kingdom;
8. University of Utah Health Sciences Center, Salt Lake City, UT;
9. Centre Hospitalier Universitaire (CHU) Bicêtre, Assistance Publique–Hôpitaux de Paris (AP-HP), University Paris Sud 11, France;
10. Gloucestershire Hospitals, National Health Service (NHS) Foundation Trust, Gloucestershire, United Kingdom;