The Editors acknowledge the directors and staff of all the registries who submitted data and responded to all the study requirements. Their sharing of data has helped to improve the comparability of all childhood cancer datasets, and their dedicated collaboration was vital to this project.
The Editors are grateful to Anastasia Dolya at IARC, who ensured timely communication within and about the project and helped with information acquisition.
The online presentation of the results was developed by Eric Masuyer with advice from Morten Ervik, Frederic Lam, Maria Valdivieso and Freddie Bray.
IICC logo by Morten Ervik.