Acknowledgements
This work was supported by the National Health Institutes [R21CA189378] to T.S. Material was provided in part by the Children’s Oncology Group (AALL15B1-Q to KMW).
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article online at https://doi.org.10.1080/10428194.2017.1397662.